Test tool after heat treatment

Abstract

The utility model discloses a testing tool after heat treatment, which is a tool capable of testing internal resistance of parts. In order to solve the technical problem, the upper testing support comprises an upper plate body, a first sliding rail is installed on the upper surface of the upper plate body, a first servo motor is installed at the top of the first sliding rail, an output shaft of the first servo motor is connected with a first lead screw, a first sliding block is installed on the first sliding rail, and the first lead screw is inserted into the first sliding block to drive the first sliding block to move. The first sliding block is provided with a test probe with a downward probe head. The test probe comprises a voltage contact and a current contact. The test probe passes through the upper plate body; a magnetic induction coil is arranged on the lower surface of the upper plate body; the lower testing support comprises a lower plate body, a second sliding rail is installed on the lower surface of the lower plate body, a second servo motor is installed on the top of the second sliding rail, an output shaft of the second servo motor is connected with a second lead screw, a second sliding block is installed on the second sliding rail, the second lead screw is inserted into the second sliding block to drive the second sliding block to move, and an infrared temperature measuring probe is installed on the second sliding block.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of test tooling, concretely relates to a test tooling after heat treatment. BACKGROUND

[0002] Carburizing heat treatment is an indispensable key link in the manufacturing process of automobile gears, gears can get higher surface hardness and good core toughness through this heat treatment, high surface hardness can make the gear have high wear resistance, corrosion resistance and fatigue resistance, good toughness of the core can make the gear resistant to bending fatigue, impact resistance, etc., change the comprehensive mechanical properties, and achieve the effect of significantly prolonging the service life of the automobile gear. The core hardness of the gear after heat treatment is an important parameter that the gear heat treatment process pays attention to, which will significantly affect the bending fatigue life of the gear, and too low core hardness will affect the bending fatigue life and cause problems such as tooth breakage, but too high core hardness will also lead to the decrease of the core toughness, impact resistance and bending fatigue life of the gear.

[0003] The core hardness of the product after heat treatment needs to be controlled within a reasonable range, so as to achieve a best fatigue endurance life. Therefore, the gear after heat treatment needs to be sampled for metallographic detection to ensure that the core hardness and other characteristics of the product in this batch are within a reasonable range of requirements.

[0004] However, the core hardness detection is destructive, and only a limited number of sample inspection detection can be carried out, but the performance of the product after heat treatment is mainly affected by the uniformity of the product itself, the grain size, the placement position of the product on the heat treatment tooling and the heat treatment process parameters, and the products after heat treatment of the same furnace will also have different core hardness performance. How to ensure that the core hardness of the products after heat treatment of the same furnace is within a reasonable range, and quickly and non-destructively select the limit piece of the core hardness of the products in this batch is a difficulty. The general heat treatment rack first considers the product loading capacity, clamping method, service life, universality and the influence of the tooling on the deformation of the product in the heat treatment process, and does not consider the selection of the core hardness of the product.

[0005] At the same time, under the control of the same heat treatment process parameters, the core hardness of the gear after heat treatment is mainly affected by the characteristics of the alloying elements in the material composition and the obtained metallographic structure, and the conductivity of the gear is significantly affected by the alloying elements in the material composition, the metallographic structure and the temperature of the gear. SUMMARY

[0006] In view of the shortcomings of the above background technology, the purpose of the utility model is to provide a test tooling after heat treatment, which can test the resistance of the part.

[0007] To solve the above technical problems, the purpose of the utility model is achieved as follows:

[0008] A heat treatment post-test tooling, comprising an upper test support, a lower test support arranged opposite to the upper test support;

[0009] The upper test support comprises an upper plate body, a first sliding rail is mounted on the upper surface of the upper plate body, a first servo motor is mounted on the top of the first sliding rail, a first lead screw is connected to the output shaft of the first servo motor, a first sliding block is mounted on the first sliding rail, the first lead screw is inserted into the first sliding block to drive movement, an upper test probe with a downward needle is mounted on the first sliding block, the upper test probe comprises an upper voltage contact and an upper current contact; the upper test probe passes through the upper plate body;

[0010] The lower test support comprises a lower plate body, a second sliding rail is mounted on the lower surface of the lower plate body, a second servo motor is mounted on the bottom of the second sliding rail, a second lead screw is connected to the output shaft of the second servo motor, a second sliding block is mounted on the second sliding rail, the second lead screw is inserted into the second sliding block to drive movement, a lower test probe with an upward needle is mounted on the second sliding block, the lower test probe comprises a lower voltage contact and a lower current contact; an infrared temperature measurement probe is mounted on the second sliding block;

[0011] The inner side of the edge of the upper plate body and the lower plate body is respectively provided with a first support column, and the two side edges of the upper plate body and the lower plate body are respectively provided with a quick clamping mechanism; the lower surface of the upper plate body is provided with a magnetic induction coil; the first support column abuts against a heat treatment rack plate, the quick clamping mechanism clamps and fixes the heat treatment rack plate, and a part is placed on the heat treatment rack plate and below the upper test probe.

[0012] On the basis of the above scheme and as a preferred scheme of the above scheme: a plurality of parts are placed on the heat treatment rack plate in an array distribution; a plurality of test point positions are arranged between the upper test support and the lower test support in an array distribution, and the distribution points of the test point positions correspond one-to-one to the placement points of the parts on the heat treatment rack plate.

[0013] On the basis of the above scheme and as a preferred scheme of the above scheme: a first through hole is formed in the heat treatment rack plate, a first support plate is protruded from the edge of the first through hole, an insulating heat-resistant base is sleeved on the top of the first support plate, and the parts are placed on the insulating heat-resistant base.

[0014] On the basis of the above scheme and as a preferred scheme of the above scheme: it further comprises a circular tube, the bottom opening edge of the circular tube is inwardly protruded to form an annular baffle; a spring is inserted into the inside of the circular tube, the upper test probe is pressed into the spring, and the upper test probe is buckled and fixed by pressing the baffle of the circular tube, and the top of the circular tube is connected and fixed with the first sliding block.

[0015] On the basis of the above scheme and as a preferred scheme of the above scheme: a red-green dual-color lamp is mounted on the shell of the first servo motor.

[0016] On the basis of the above scheme and as a preferred scheme of the above scheme: the lower surface of the upper plate body is provided with two symmetrical telescopic mechanisms; the telescopic mechanism comprises a third sliding rail, the third sliding rail is installed on the upper plate body, a third servo motor is installed on the third sliding rail, a third screw rod is connected to the output shaft of the third servo motor, a third sliding block is installed on the third sliding rail, the third screw rod is inserted into the third sliding block to drive movement, and a semicircular magnetic induction coil is installed on the third sliding block.

[0017] The utility model discloses compared with prior art highlights and beneficial technical effect is:

[0018] The utility model discloses heat treatment after testing tool, compared with prior art, after the heat treatment of the product to be measured, the upper plate body and lower plate body are fixed on the heat treatment material rack board through the fast clamping mechanism respectively, the first servo motor drives the first sliding block to move down, drives the upper voltage contact and upper current contact of the upper test probe to contact the part, the second servo motor drives the second sliding block to move up, drives the lower voltage contact and lower current contact of the lower test probe to contact the part, measures the voltage and current value, and calculates the resistance value of the part.

[0019] The upper and lower test probes are provided with the pre-tightening mechanism of the top pressure spring, and good contact between the upper and lower test probes and the product to be measured is ensured.

[0020] The magnetic induction coil is powered to heat the part, the infrared temperature measuring probe moves up, and the infrared temperature measuring probe is used to measure the temperature of the part, the product is heated to the temperature TB, and then the internal resistance test is started, the indicator light on each test point position flashes red and green alternately during the test, after the test, according to the best fitting HRCT after fitting, the indicator light above the product with the minimum hardness of the core is green and constant, the indicator light above the product with the maximum hardness is red and constant, and the indicator light above the other products is extinguished, so that the operator can conveniently take the product with the maximum and minimum internal resistance, and the risk of mistaken taking is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the top view structural schematic drawing of the utility model.

[0022] Figure 2 It is the C-C section view structural schematic drawing in the drawing.

[0023] Figure 3 It is the test structure schematic drawing of the utility model.

[0024] Figure 4 It is the A-A section view structural schematic drawing in the drawing.

[0025] : upper test support 01; upper plate body 010; first sliding rail 011; first servo motor 012; red-green double-color lamp 0120; first lead screw 013; first sliding block 014; upper test probe 015; upper voltage contact 0150; upper current contact 0151; magnetic induction coil 016; fast clamping mechanism 017; test point 018; lower test support 02; lower plate body 020; second sliding rail 021; second servo motor 022; second lead screw 023; second sliding block 024; infrared temperature measurement probe 025; first supporting column 026; heat treatment rack plate 03; first through hole 030; first supporting plate 031; insulating heat-resistant base 032; telescopic mechanism 04; third sliding rail 040; third servo motor 041; third lead screw 042; third sliding block 043; part 10; DETAILED DESCRIPTION

[0026] The utility model will be further described in conjunction with the drawings with specific embodiments;

[0027] The embodiment gives a heat treatment test tool, which comprises an upper test support 01 and a lower test support 02 arranged opposite to the upper test support 01; the upper test support 01 and the lower test support 02 are used in pairs;

[0028] The upper test support 01 comprises an upper plate body 010, which is a flat plate matched with the placement of the test part 10; a first sliding rail 011 is installed on the upper surface of the upper plate body 010; one or two first sliding rails 011 are vertically fixed on the upper surface of the upper plate body 010 and can be welded and fixed; a first servo motor 012 is installed on the top of the first sliding rail 011; the output shaft of the first servo motor 012 is connected with a first lead screw 013; a first sliding block 014 is installed on the first sliding rail 011; the first lead screw 013 is inserted into the first sliding block 014 to drive movement; an upper test probe 015 with a needle downward is installed on the first sliding block 014; the upper test probe 015 comprises an upper voltage contact 0150 and an upper current contact 0151; the upper test probe 015 penetrates through the upper plate body 010;

[0029] The lower test support 02 comprises a lower plate body 020 which is plate-shaped and matched with the upper plate body 010; a second sliding rail 021 is mounted on the lower surface of the lower plate body 020, and one or two second sliding rails 021 are fixed on the lower plate body 020; a second servo motor 022 is mounted on the top of the second sliding rail 021, a second screw rod 023 is connected to the output shaft of the second servo motor 022, a second sliding block 024 is mounted on the second sliding rail 021 and driven to move by the second screw rod 023, and a lower test probe with a needle pointing upwards is mounted on the second sliding block; the lower test probe comprises a lower voltage contact and a lower current contact; the upper test probe 015 and the lower test probe are symmetrically arranged to form a complete circuit; a magnetic induction coil 016 is arranged on the lower surface of the upper plate body 010; the magnetic induction coil 016 is used for heating the part 10;

[0030] The upper test probe 015 and the lower test probe are used for measuring the voltage and current values of the part 10, and then calculating the resistance value of the part 10, so as to deduce whether the core hardness of the part 10 meets the requirements;

[0031] An infrared temperature measurement probe 025 is mounted on the second sliding block 024; the infrared temperature measurement probe 025 is mounted between the lower voltage contact and the lower current contact; the infrared temperature measurement probe 025 is used for measuring the temperature of the part 10 and can cooperate with the magnetic induction coil 016 to control the heating temperature;

[0032] First support columns 026 are arranged on the inner sides of the edges of the upper plate body 010 and the lower plate body 020 respectively, and quick clamping mechanisms 017 are mounted on the two side edges of the upper plate body 010 and the lower plate body 020 respectively; the first support columns 026 abut against the heat treatment rack plate 03, and the quick clamping mechanisms 017 clamp and fix the heat treatment rack plate 03, and the part 10 is placed on the heat treatment rack plate 03 and located below the upper test probe 015.

[0033] As described above, in the specific use process, after the heat treatment process is completed, the upper test support 01 and the lower test support 02 are respectively installed on the upper and lower sides of the heat treatment rack plate 03 through the quick clamping mechanisms 017; under the cooperation of the magnetic induction coil 016 and the infrared temperature measurement probe 025, the part 10 is heated at a certain interval temperature T; and the internal resistance of each part 10 is tested through the cooperation of the upper test probe 015 and the lower test probe, and the products with different core hardnesses of the same batch of parts 10 after heat treatment are selected;

[0034] Preferably, the internal resistance test cables on the upper test support 01 and the lower test support 02 are respectively converged to one quick connector, the cable on the magnetic induction coil 016 is converged to another quick connector, and all the quick connectors can be connected to an external test control instrument through cables with a matched interface external connector.

[0035] Further, the heat treatment rack plate 03 is arranged with a plurality of parts 10 in an array; a plurality of test points 018 are arranged in an array between the upper test support 01 and the lower test support 02, and the distribution points of the test points 018 correspond to the placing points of the parts 10 on the heat treatment rack plate 03 one by one.

[0036] As described above, the test points 018 on the upper test support 01 and the lower test support 02 are arranged in an array, and the distribution points correspond to the placing points of the parts 10 (such as gears) on the heat treatment rack plate 03 one by one; each test point 018 on the upper test support 01 and the lower test support 02 has a pair of test points, which are symmetrically arranged on the upper test support 01 and the lower test support 02; the parts 10 can be tested at one time or as few times as possible, thereby improving the efficiency.

[0037] Further, the heat treatment rack plate 03 is arranged with a plurality of parts 10 in an array; a plurality of test points 018 are arranged in an array between the upper test support 01 and the lower test support 02, and the distribution points of the test points 018 correspond to the placing points of the parts 10 on the heat treatment rack plate 03 one by one; each test point 018 on the upper test support 01 and the lower test support 02 has a pair of test points, which are symmetrically arranged on the upper test support 01 and the lower test support 02; the parts 10 can be tested at one time or as few times as possible, thereby improving the efficiency.

[0038] As described above, the heat treatment rack plate 03 is arranged with a plurality of parts 10 in an array; a plurality of test points 018 are arranged in an array between the upper test support 01 and the lower test support 02, and the distribution points of the test points 018 correspond to the placing points of the parts 10 on the heat treatment rack plate 03 one by one; each test point 018 on the upper test support 01 and the lower test support 02 has a pair of test points, which are symmetrically arranged on the upper test support 01 and the lower test support 02; the parts 10 can be tested at one time or as few times as possible, thereby improving the efficiency.

[0039] Further, the heat treatment rack plate 03 is arranged with a plurality of parts 10 in an array; a plurality of test points 018 are arranged in an array between the upper test support 01 and the lower test support 02, and the distribution points of the test points 018 correspond to the placing points of the parts 10 on the heat treatment rack plate 03 one by one; each test point 018 on the upper test support 01 and the lower test support 02 has a pair of test points, which are symmetrically arranged on the upper test support 01 and the lower test support 02; the parts 10 can be tested at one time or as few times as possible, thereby improving the efficiency.

[0040] As described above, the heat treatment rack plate 03 is arranged with a plurality of parts 10 in an array; a plurality of test points 018 are arranged in an array between the upper test support 01 and the lower test support 02, and the distribution points of the test points 018 correspond to the placing points of the parts 10 on the heat treatment rack plate 03 one by one; each test point 018 on the upper test support 01 and the lower test support 02 has a pair of test points, which are symmetrically arranged on the upper test support 01 and the lower test support 02; the parts 10 can be tested at one time or as few times as possible, thereby improving the efficiency.

[0041] Further, the housing of the first servo motor 012 is arranged with a red-green dual-color lamp 0120.

[0042] As described above, the red-green dual-color lamp 0120 can be lit under the control of an external tester, and the red light of the indicator represents the highest resistance part, and the green light represents the lowest resistance part, thereby facilitating the selection of the extreme parts.

[0043] Further, the lower surface of the upper plate body 010 is provided with two symmetrical telescopic mechanisms 04; the telescopic mechanism 04 comprises a third sliding rail 040, the third sliding rail 040 is installed on the upper plate body 010, a third servo motor 041 is installed on the third sliding rail 040, a third screw rod 042 is connected with the output shaft of the third servo motor 041, a third sliding block 043 is installed on the third sliding rail 040, the third screw rod 042 is inserted into the third sliding block 043 to drive movement, and a semicircular magnetic induction coil 016 is installed on the third sliding block 043.

[0044] As described above, the third servo motor 041 drives the third screw rod 042 to rotate, realizes sliding back and forth movement, and the distance between the magnetic induction coil 016 and the part 10 is suitable for different size gear parts 10, and is more practical.

[0045] In the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0046] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected;

[0047] The above embodiments are only preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A post heat treatment test fixture characterized by: The upper test support and the lower test support are arranged opposite to each other. The upper test support includes an upper plate body, a first sliding rail is mounted on the upper surface of the upper plate body, a first servo motor is mounted on the top of the first sliding rail, a first screw rod is connected to the output shaft of the first servo motor, a first sliding block is mounted on the first sliding rail and is driven to move by the first screw rod, an upper test probe with a needle downward is mounted on the first sliding block, and the upper test probe includes an upper voltage contact and an upper current contact; the upper test probe penetrates through the upper plate body. The lower test support includes a lower plate body, a second sliding rail is mounted on the lower surface of the lower plate body, a second servo motor is mounted on the bottom of the second sliding rail, a second screw rod is connected to the output shaft of the second servo motor, a second sliding block is mounted on the second sliding rail and is driven to move by the second screw rod, a lower test probe with a needle upward is mounted on the second sliding block, and the lower test probe includes a lower voltage contact and a lower current contact; an infrared temperature measurement probe is mounted on the second sliding block. First support columns are arranged on the inner sides of the edges of the upper plate body and the lower plate body, quick clamping mechanisms are mounted on the two side edges of the upper plate body and the lower plate body, and a magnetic induction coil is arranged on the lower surface of the upper plate body. The first support columns abut against a heat treatment rack plate, the quick clamping mechanisms clamp and fix the heat treatment rack plate, and parts are placed on the heat treatment rack plate and below the upper test probe.

2. The post heat treatment test fixture of claim 1, wherein: A plurality of parts are arranged in an array on the heat treatment rack plate, a plurality of test points are arranged in an array between the upper test support and the lower test support, and the distribution points of the test points correspond to the placement points of the parts on the heat treatment rack plate one by one.

3. The post heat treatment test fixture of claim 2, wherein: A first through hole is arranged on the heat treatment rack plate, a first support plate is protruded from the edge of the first through hole, an insulating heat-resistant base is arranged on the top of the first support plate, and the parts are placed on the insulating heat-resistant base.

4. The post heat treatment test fixture of claim 1, wherein: A circular tube is further arranged, a ring-shaped baffle is protruded inward from the opening edge of the bottom of the circular tube, a spring is inserted into the circular tube, the upper test probe is pressed into the spring, the baffle of the circular tube is pressed to form a buckle fixation, and the top of the circular tube is connected and fixed with the first sliding block.

5. The post heat treatment test fixture of claim 1, wherein: A red-green dual-color lamp is mounted on the shell of the first servo motor.

6. The post heat treatment test fixture of claim 1, wherein: Two symmetrical telescopic mechanisms are mounted on the lower surface of the upper plate body, the telescopic mechanism includes a third sliding rail, the third sliding rail is mounted on the upper plate body, a third servo motor is mounted on the third sliding rail, a third screw rod is connected to the output shaft of the third servo motor, a third sliding block is mounted on the third sliding rail and is driven to move by the third screw rod, and a semicircular magnetic induction coil is mounted on the third sliding block.

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