A deep hole inner cone angle gauge

Abstract

A deep hole inner taper angle gauge comprises a fixed probe, a movable probe, a dial gauge, a reset spring and a gauge seat, the fixed probe is composed of a clamping section and an insertion section, a through hole is formed in the center of the clamping section, and a insertion hole is formed in the center of the insertion section, the movable probe is composed of a sliding section and a measuring section, the movable probe is inserted into the fixed probe, the outer diameter of the measuring section is smaller than that of the insertion section by one millimeter, the movable probe can slide up and down in the fixed probe, the length difference between the measuring section and the insertion section is greater than the height of the taper angle of the workpiece to be measured, the clamping section of the fixed probe is sleeved in the lower section of the inner hole of the gauge seat, the dial gauge is sleeved in the upper section of the inner hole of the gauge seat, and both are clamped on the gauge seat by clamping bolts, the bottom end of the measuring head of the dial gauge is in contact with the top end of the movable probe, and a reset spring is arranged between the dial gauge and the top end of the movable probe. The present application is simple and fast to operate, does not need repeated conversion, has high inspection efficiency, and the measured value is accurate.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of component detection tools, in particular to deep hole inner cone angle detection tool. BACKGROUND

[0002] Oil sprayer is an important part in automobile brake system, and the sealing seat of oil sprayer is an important part in oil sprayer, in order to ensure the safe work of brake system hydraulic circuit, the sealing seat inner hole sealing requirement is high, and the bottom cone angle of sealing seat inner hole affects the oil injection effect, so whether the bottom cone of hole meets the design requirement directly affects the sealing of product, after the precision grinding of bottom cone of sealing seat hole, the importance of the consistency control of cone angle is self-evident. But the bottom cone angle of sealing seat hole of oil sprayer is relatively hidden in structure, it is difficult to observe and measure, and the bottom cone angle must be measured by using measuring gauge. The measurement of the existing cone angle gauge is shown in Figures 1-2 The upper section diameter of small diameter detection rod 1 and large diameter detection rod 2 is the same as the upper section inner hole diameter of the workpiece to be measured, the lower end diameter of small diameter detection rod 1 is larger than the bottom end diameter of the bottom cone of the inner hole of the workpiece to be measured, the lower end diameter of large diameter detection rod 2 is smaller than the top end diameter of the bottom cone of the inner hole of the workpiece to be measured, the lower end diameter of small diameter detection rod 1 is 1mm smaller than the lower end diameter of large diameter detection rod 2, small diameter detection rod 1 and large diameter detection rod 2 are respectively put into the inner hole of the workpiece to be measured, and the distance H1 from the bottom end of the workpiece to be measured to the top end of small diameter detection rod 1 and the distance H2 from the bottom end of the workpiece to be measured to the top end of large diameter detection rod 2 are measured respectively, the height difference △d of small diameter detection rod 1 and large diameter detection rod 2 at the two positions between the upper and lower openings of the inner hole cone of the workpiece to be measured is H2-H1, the angle α° of the bottom cone of the inner hole of the sealing seat is calculated by using the lower end diameter of small diameter detection rod 1 and large diameter detection rod 2 and △d, using the Pythagorean theorem and inverse trigonometric function. Although this gauge is simple and has low manufacturing cost, the measurement method is complicated, and the angle α° of the inner hole bottom cone of the workpiece to be measured can be obtained only after complex calculation, the efficiency is very low, and the batch production process cannot guarantee the 100% inspection requirement. Moreover, due to the machining error of the verticality between the inner hole and the bottom surface of the workpiece to be measured and the verticality between the end surface of the detection rod and the outer circle, the detection error is large, and the angle deviation can only be controlled within ±1°.

[0003] According to the accuracy requirement of product design and the efficiency requirement of production and manufacturing, the applicant has invented a deep hole inner cone angle gauge after a long time of research, which is simple and convenient to operate, does not need repeated conversion, can directly and quickly measure the angle α° of the inner hole bottom cone of the workpiece to be measured, has high inspection efficiency, and is accurate in measurement. SUMMARY

[0004] The deep hole inner cone angle gauge has the advantages that the deep hole inner cone angle gauge is simple in operation, does not need repeated conversion, can directly and quickly measure the angle of the deep hole inner bottom cone, is high in inspection efficiency, and is accurate in measurement.

[0005] The technical scheme adopted by the deep hole inner cone angle gauge is as follows.

[0006] The deep hole inner cone angle gauge has the advantages that the deep hole inner cone angle gauge is simple in operation, does not need repeated conversion, can directly and quickly measure the angle of the deep hole inner bottom cone, is high in inspection efficiency, and is accurate in measurement.

[0007] The use method of the deep hole inner cone angle gauge is as follows: when measuring, a standard angle workpiece is selected, the inner hole bottom cone angle of the workpiece is set as a standard angle alpha, the insertion section of the fixed measuring head is inserted into the inner hole of the workpiece, the lower end of the measuring section and the insertion section are in contact with the bottom cone of the workpiece, the micrometer is adjusted so that the measuring head of the micrometer is in contact with the top end of the movable measuring head, then the value displayed on the micrometer is set as a standard delta d, then the micrometer is adjusted to zero, then the deep hole inner cone angle of a workpiece to be measured is detected by using the adjusted deep hole inner cone angle gauge. In the measuring process, the inner cone angles of different workpieces are different, that is, the delta d value is also different, the height difference is reflected on the micrometer, and the difference value can be directly read out, the cone angle difference is directly obtained through conversion, through actual testing, the delta d error of a single workpiece is within 0.002, so in the actual situation, the height difference of 0.002 can be finally read out, the angle is converted into 0.1 degree, and then in the measuring process, the angle deviation of the workpiece can be controlled to be within 0.1 degree.

[0008] The deep hole inner cone angle gauge has the advantages that the deep hole inner cone angle gauge is simple in operation, does not need repeated conversion, can directly and quickly measure the angle of the deep hole inner bottom cone, is high in inspection efficiency, and is accurate in measurement. The deep hole inner cone angle gauge has the advantages that the deep hole inner cone angle gauge is simple in operation, can measure the difference between the measured angle and the standard angle at one time, is simple and quick in operation, does not need repeated conversion, the inspection efficiency is increased by four to six times, the batch inspection requirement can be guaranteed in the batch production process, the measuring time is greatly saved, and the labor cost is saved. The measuring value of the deep hole inner cone angle gauge is accurate, and the accuracy is directly increased by one order of magnitude compared with the original method. Attached image description:

[0009] Figure 1 This is a schematic diagram of the structure of an existing small-diameter inspection bar when inspecting a workpiece.

[0010] Figure 2 This is a schematic diagram of the structure of an existing large-diameter inspection bar when inspecting a workpiece.

[0011] Figure 3 This is a schematic diagram of the structure of the present invention;

[0012] Figure 4 This is a schematic diagram of the fixed probe structure of the present invention;

[0013] Figure 5 This is a schematic diagram of the structure of the movable probe of the present invention;

[0014] Figure 6 This is a schematic diagram of the structure in use of the present invention;

[0015] Figure 7 for Figure 6 Enlarged diagram of point A in the diagram;

[0016] In the diagram: 1-Small diameter test bar; 2-Large diameter test bar; 3-Fixed probe; 4-Moving probe; 5-Dial indicator; 6-Reset spring; 7-Indicator base; 8-Clamping bolt; 31-Clamping section; 32-Insert section; 33-Through hole; 34-Insertion hole; 41-Sliding section; 42-Measuring section. Detailed implementation method:

[0017] The specific embodiments of the present invention are described below with reference to the accompanying drawings:

[0018] A deep hole internal conical surface angle gauge, such as Figures 3-7As shown, including fixed measuring head 3, movable measuring head 4, micrometer 5, reset spring 6 and table seat 7, the fixed measuring head 3 is composed of clamping section 31 and insertion section 32, the outer diameter of clamping section 31 is larger than that of insertion section 32, the outer diameter of insertion section 32 is the same as the diameter of the upper hole of the workpiece to be measured, a through hole 33 is opened in the center of clamping section 31, and a plug hole 34 coaxial with through hole 33 is opened in the center of insertion section 32, the movable measuring head 4 is composed of sliding section 41 and measuring section 42, the outer diameter of sliding section 41 is larger than that of measuring section 42, the movable measuring head 4 is inserted into the fixed measuring head 3, the sliding section 41 is tightly matched with the through hole 33, the measuring section 42 is tightly matched with the plug hole 34, the outer diameter of the measuring section 42 is one millimeter smaller than that of the insertion section 32, the movable measuring head 4 can slide up and down in the fixed measuring head 3, the length difference between the measuring section 42 and the insertion section 32 is greater than the height of the taper angle of the workpiece to be measured, the clamping section 31 of the fixed measuring head 3 is sleeved on the lower section of the inner hole of the table seat 7, the micrometer 5 is fixedly clamped on the upper section of the inner hole of the table seat 7, and both are fixedly clamped on the table seat 7 by clamping bolts 8, the bottom end of the measuring head of the micrometer 5 is in contact with the top end of the movable measuring head 4, and the reset spring 6 is arranged between the bottom end of the non-moving end of the micrometer 5 and the top end of the movable measuring head 4.

[0019] The above is only the preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solution falling within the concept of the present application belongs to the protection scope of the present application.

[0020] It should be noted that all functionally equivalent technical solutions proposed by those skilled in the art without departing from the principles of the present application belong to the protection scope of the present application.

Claims

1. A deep hole inner cone angle gauge, characterized in that: The utility model discloses a fixed head (3), movable head (4), dial gauge (5), reset spring (6) and table seat (7), the fixed head (3) is composed of clamping section (31) and insert section (32), and the outer diameter of clamping section (31) is greater than the outer diameter of insert section (32), and the outer diameter of insert section (32) is same with the diameter of the upper hole of the workpiece to be measured, and the center of clamping section (31) is provided with through-hole (33), and the center of insert section (32) is provided with the insertion hole (34) coaxial with through-hole (33), the movable head (4) is composed of sliding section (41) and measuring section (42), and the outer diameter of sliding section (41) is greater than the outer diameter of measuring section (42), and the movable head (4) is inserted in the fixed head (3), and sliding section (41) is closely matched with through-hole (33), and measuring section (42) is closely matched with insertion hole (34), and the outer diameter of measuring section (42) is less than the outer diameter of insert section (32) by one millimeter, and the movable head (4) can slide up and down in the fixed head (3), and the length difference between measuring section (42) and insert section (32) is greater than the height of the taper angle of the workpiece to be measured, and the clamping section (31) of fixed head (3) is sleeved in the lower section of the inner hole of table seat (7), and dial gauge (5) is fixedly clamped in the upper section of the inner hole of table seat (7), and is all fixedly clamped on table seat (7) by clamping bolt (8), and the bottom end of the measuring head of dial gauge (5) is in contact with the top end of movable head (4), and reset spring (6) is arranged between the bottom end of the non-activity end of dial gauge (5) and the top end of movable head (4). ​

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