Armature rod distance dimension detection clamp

Abstract

The invention discloses an armature rod distance dimension detection clamp comprising an armature rod to be tested, the upper end of the armature rod to be tested is provided with a circle of groove; the positioning block is used for positioning an armature rod to be tested; the clamping plate is arranged above the positioning block in a sliding mode, the clamping plate is provided with a clamping groove, the clamping groove is clamped into a ring groove of the armature rod to be tested to drive the armature rod to be tested to move up and down, the clamping groove is provided with an upper positioning face, and the upper positioning face makes contact with the upper groove face of the ring groove; and the dial indicator is arranged above the clamping plate and is used for carrying out point acquisition measurement on the upper end surface of the to-be-tested armature rod and the upper positioning surface of the clamping plate in sequence, and then calculating a difference value between the upper end surface and the upper positioning surface to obtain the distance size of the armature rod. According to the invention, the distance of the armature rod can be rapidly detected, and online detection can be realized, so that unqualified products are effectively prevented from entering the next process, the product qualification rate is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of tooling fixtures, and in particular relates to an armature rod distance size detection fixture. Background Art

[0002] The electronic fuel injector is the most important component of the fuel injection system, and the armature rod is one of the core parts of the electronic fuel injector. The quality of the armature rod processing and the level of processing accuracy determine the injection quality and qualified rate of the finished product of the electronic fuel injector. The distance dimension detected by the armature rod is the length dimension from an end face to a shallow groove, which has the characteristics of high dimensional accuracy requirements and difficult detection. This distance dimension determines the size and consistency of the injector ball valve lift, thereby affecting the fuel supply of the injector, and then affecting the working quality, economy, and environmental protection of the injector. However, the depth of the ring groove of the armature rod is only 0.6-0.8mm. This distance dimension can only be measured by Wangongxian, resulting in long debugging time, high detection cost, low efficiency, and difficulty in achieving stable mass production. Summary of the invention

[0003] The purpose of the present invention is to provide a fixture for detecting the distance dimension of the armature rod, in view of the problem that the above-mentioned distance dimension can only be measured by a universal display, resulting in a long debugging time in the production process, high detection cost, low efficiency, and difficulty in achieving stable mass production. It can realize online detection and can easily and quickly determine whether the distance dimension is qualified. Thereby effectively preventing unqualified products from flowing into the next process, improving the product qualification rate and enhancing production efficiency.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] An armature rod distance size detection fixture comprises: an armature rod to be tested, wherein the upper end of the armature rod to be tested has a circle groove; and the feature is that it also comprises:

[0006] A positioning block for positioning the armature rod to be tested;

[0007] A card plate slidably disposed above the positioning block, the card plate having a card slot, the card slot being inserted into the ring slot of the armature rod to be tested, driving the armature rod to be tested to move up and down, the card slot having an upper positioning surface, the upper positioning surface being in contact with the upper groove surface of the ring groove;

[0008] A micrometer is arranged above the clamping plate, and the micrometer successively measures points on the upper end surface of the armature rod to be tested and the upper positioning surface of the clamping plate, and then calculates the difference between the two to obtain the armature rod distance size.

[0009] In a preferred embodiment of the present invention, a positioning groove is provided on the positioning block, and the armature rod to be tested is positioned in the positioning groove.

[0010] In a preferred embodiment of the present invention, a lower positioning surface is provided on the positioning block, and the lower positioning surface is located below the positioning groove; a lower end surface is provided at the lower part of the armature rod to be tested, and the lower end surface is in positioning contact and cooperation with the lower positioning surface.

[0011] In a preferred embodiment of the present invention, the upper groove surface of the ring groove of the armature rod to be tested, the upper positioning surface of the clamping plate, the lower end surface of the lower part of the armature rod to be tested, and the lower positioning surface of the positioning block are parallel to each other.

[0012] In a preferred embodiment of the present invention, it also includes:

[0013] An inspection body, the card plate is slidably arranged on the inspection body, and the positioning block is fixed on the inspection body;

[0014] A guide rod slidably disposed in the inspection body, the upper end of the guide rod being fixedly connected to the card plate to drive the card plate to move up and down;

[0015] An adjustment seat fixed on the inspection body, the adjustment seat being located below the positioning block;

[0016] An adjusting screw mounted on the adjusting seat;

[0017] An adjusting spring, the upper end of which contacts the lower end of the guide rod, and the lower end of which contacts the adjusting screw. The adjusting spring is used to push the clamping plate upward through the guide rod, and the spring force of the adjusting spring is adjusted by the adjusting screw.

[0018] In a preferred embodiment of the present invention, the positioning block is fixed to the inspection body by means of positioning pins and screws; and the adjustment seat is fixed to the inspection body by means of screws.

[0019] In a preferred embodiment of the present invention, it also includes:

[0020] a measuring table frame, on which the positioning block is fixed;

[0021] A measuring meter frame guide rod fixed on the measuring meter frame and extending upward;

[0022] A measuring meter frame bracket is adjustable and can be fixed on the measuring meter frame guide rod at any time, and the micrometer is installed on the measuring meter frame bracket.

[0023] In a preferred embodiment of the present invention, the micrometer is mounted on the measuring meter stand bracket using a micrometer clamping screw.

[0024] Due to the adoption of the above technical solution, the present invention can realize online detection and can easily and quickly determine whether the distance dimension is qualified, thereby effectively preventing unqualified products from flowing into the next process, improving the product qualification rate and enhancing production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 Schematic diagram of the structure of the armature rod to be tested.

[0027] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the armature rod distance dimension detection fixture of the present invention.

[0028] Figure 3 The present invention is a schematic diagram of the main body without auxiliary devices such as a measuring table stand, a micrometer, and a table stand guide rod. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory.

[0030] See also Figure 1 The armature rod 1 to be tested has a groove 1a at its upper end, a lower end surface 1b at its lower end, and an upper end surface 1c at its upper end. Figure 1 The L in the figure is the distance to be measured.

[0031] See also Figure 2 and Figure 3 The figure shows an armature rod distance size detection fixture, which includes a measuring meter frame guide rod 10, a micrometer 20, a measuring meter frame bracket 30, a micrometer clamping screw 31, a measuring meter frame 40, a detection body 50, an adjustment seat 60, a screw (M4) 61; a clamping plate 70, a positioning block 80, a positioning pin 81, a screw (M4) 82, 13, a guide rod 90, an adjustment spring 100 and an adjustment screw 110.

[0032] The measuring meter frame guide rod 10 and the inspection body 50 are fixed on the measuring meter frame 40, and the measuring meter frame guide rod 10 extends upward. The measuring meter frame bracket 30 is installed on the measuring meter frame guide rod 10, and the height of the measuring meter frame bracket 30 on the measuring meter frame guide rod 10 can be adjusted and fixed at any time. The micrometer 20 is installed on the measuring meter frame bracket 30 using a micrometer clamping screw 31, and the micrometer 20 is located above the clamping plate 70.

[0033] A slide groove 51 is provided on the inspection body 50, and a clamping plate 70 is slidably arranged in the slide groove 51, so that the clamping plate 70 can move up and down along the slide groove 51. The clamping plate 70 has a clamping groove 71, which is clamped into the ring groove 1a of the armature rod 1 to be tested, driving the armature rod 1 to be tested to move up and down, and the clamping groove 71 has an upper positioning surface 72, and the upper positioning surface 72 contacts the upper groove surface of the ring groove 1a, so that the armature rod 1 to be tested is stably positioned on the inspection body 50.

[0034] The positioning block 80 is fixed on the inspection body 50 by means of a positioning pin 81 and a screw (M4) 82 and is located below the clamping plate 70. A positioning groove 83 is provided on the positioning block 80, and the armature rod 1 to be tested is positioned in the positioning groove 83. A lower positioning surface 84 is provided on the positioning block 80, and the lower positioning surface 84 is located below the positioning groove 83; the lower end surface 1b of the lower part of the armature rod 1 to be tested is in positioning contact with the lower positioning surface 84.

[0035] The upper groove surface of the ring groove 1a of the armature rod 1 to be tested, the upper positioning surface 72 of the clamping plate 70, the lower end surface 1b of the lower part of the armature rod 1 to be tested, and the lower positioning surface 84 of the positioning block 80 are parallel to each other.

[0036] The guide rod 90 is slidably disposed in the positioning block 80 and can move up and down. The upper end of the guide rod 90 is fixedly connected to the card plate 70 to drive the card plate 70 to move up and down.

[0037] The adjustment seat 60 is fixed on the inspection body 80 by screws 61 and is located below the positioning block 80; an adjustment screw 110 is screwed on the adjustment seat 60, the upper end of the adjustment spring 100 contacts the lower end of the guide rod 90, and the lower end of the adjustment spring 100 contacts the adjustment screw 110. With the help of the adjustment spring 100, the card plate 70 is pushed upward through the guide rod 90, but the upward thrust of the guide rod 90 should be moderate. The spring force of the adjustment spring 100 is adjusted by adjusting the screw 110.

[0038] When the present invention is used, firstly, the armature rod standard part is pressed Figure 2 and Figure 3 As shown, it is clamped on the inspection body 50 and the clamping plate 70 of the present invention, and a micrometer 20 (range 0-25mm) is used to successively measure points on the upper end surface 1c of the armature rod 1 to be tested and the clamping plate 70, and then the difference between the two is calculated to obtain the armature rod distance dimension L.

[0039] In order to prevent the measuring fixture of the present invention from changing during the process, it is necessary to make a standard armature rod part, which can be measured on the universal display to determine the distance L value. Before use, this armature rod standard part is used for benchmarking. To ensure that this measuring fixture is reliable and stable. After multiple benchmarking with the universal display, there is no difference in the measured value, indicating that this detection fixture is feasible.

Claims

1. An armature rod distance size detection fixture, comprising: The armature rod to be tested has a groove on its upper end; the armature rod to be tested is characterized in that it also includes: A positioning block for positioning the armature rod to be tested; A card plate slidably disposed above the positioning block, the card plate having a card slot, the card slot being inserted into the ring slot of the armature rod to be tested, driving the armature rod to be tested to move up and down, the card slot having an upper positioning surface, the upper positioning surface being in contact with the upper groove surface of the ring groove; A micrometer is arranged above the clamping plate, and the micrometer successively measures points on the upper end surface of the armature rod to be tested and the upper positioning surface of the clamping plate, and then calculates the difference between the two to obtain the armature rod distance size.

2. The armature rod distance size detection fixture according to claim 1, characterized in that: A positioning groove is arranged on the positioning block, and the armature rod to be tested is positioned in the positioning groove.

3. The armature rod distance size detection fixture according to claim 2, characterized in that: A lower positioning surface is arranged on the positioning block, and the lower positioning surface is located below the positioning groove; a lower end surface is arranged at the lower part of the armature rod to be tested, and the lower end surface is in positioning contact and cooperation with the lower positioning surface.

4. The armature rod distance size detection fixture according to claim 3, characterized in that: The upper groove surface of the ring groove of the armature rod to be tested, the upper positioning surface of the clamping plate, the lower end surface of the lower part of the armature rod to be tested, and the lower positioning surface of the positioning block are parallel to each other.

5. The armature rod distance size detection fixture according to claim 4, characterized in that: Also includes: An inspection body, the card plate is slidably arranged on the inspection body, and the positioning block is fixed on the inspection body; A guide rod slidably disposed in the inspection body, the upper end of the guide rod is fixedly connected to the card plate to drive the card plate to move up and down; An adjustment seat fixed on the inspection body, the adjustment seat being located below the positioning block; An adjusting screw mounted on the adjusting seat; An adjusting spring, the upper end of which contacts the lower end of the guide rod, and the lower end of which contacts the adjusting screw. The adjusting spring is used to push the clamping plate upward through the guide rod, and the spring force of the adjusting spring is adjusted by the adjusting screw.

6. The armature rod distance size detection fixture according to claim 5, characterized in that: The positioning block is fixed on the inspection body by using positioning pins and screws; the adjustment seat is fixed on the inspection body by using screws.

7. The armature rod distance size detection fixture according to claim 6, characterized in that: Also includes: a measuring table frame, on which the positioning block is fixed; A measuring meter frame guide rod fixed on the measuring meter frame and extending upward; A measuring meter stand bracket is adjustable and can be fixed on the measuring meter stand guide rod at any time, and the micrometer is installed on the measuring meter stand bracket.

8. The armature rod distance size detection fixture according to claim 7, characterized in that: The micrometer is mounted on the measuring meter frame bracket by using a micrometer clamping screw.

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