Device for measuring parallelism of faces of inside micrometer

Abstract

The utility model discloses a kind of inner measuring micrometer measuring surface parallelism assembly device, one side of its base is equipped with lock frame, the other side of the base of lock frame rear side is equipped with vertical plate, and left tight force screw and right tight force screw are equipped on vertical plate and are opposite;Lock frame clamps the scale sleeve of inner measuring micrometer to make the left measuring claw I and right measuring claw I of inner measuring micrometer be between left tight force screw and right tight force screw, and the top of each measuring claw is equipped with stick hole, and left measuring stick and right measuring stick are equipped with through clamp parallel clamping corresponding to left and right stick hole;Adjusting each tight force screw side portion of corresponding measuring claw is pressed to eliminate the fit gap between measuring screw and threaded shaft sleeve of inner measuring micrometer;Lower fixture and left measuring stick and right measuring stick are inserted in left and right stick hole, and each stick hole is removed clamp after firmly measuring stick is bonded with glue.Using the utility model, it is guaranteed that the parallelism of measuring surface generatrix when inner measuring micrometer is used meets the requirement of national standard.

Description

Technical Field

[0001] This utility model relates to the assembly technology of geometric measuring instruments, specifically an assembly device for ensuring the parallelism of the measuring surfaces of an internal micrometer. Background Technology

[0002] Internal micrometers are a common type of geometric measuring instrument. The two main structural types of internal micrometers are as follows: Figure 1 , Figure 2 As shown.

[0003] In the process of assembling internal micrometer measuring tools, ensuring that the parallelism of the two measuring surfaces meets the requirements of the national product standard is a major task. However, in actual production, the proportion of non-compliance of the parallelism of the two measuring surfaces during assembly is relatively high, which is the key difficulty of the entire assembly work. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model proposes an assembly device for ensuring the parallelism of the measuring surfaces of the left and right measuring claws meets the requirements of national product standards during the assembly process of an internal micrometer.

[0005] The technical solution one of the internal micrometer measuring surface parallelism assembly device, which can solve the existing technical problems, includes a base, but differs in that:

[0006] 1. A locking frame is provided on the left or right side of the base, and a vertical plate is provided on the right or left side of the base behind the locking frame. A left tightening screw and a right tightening screw are provided on the vertical plate.

[0007] 2. The locking frame clamps the threaded bushing of the internal micrometer so that the left and right measuring jaws of the internal micrometer are positioned between the left and right tightening screws. Each measuring jaw has a rod hole on its top, and a left measuring rod and a right measuring rod are provided corresponding to the left and right rod holes and clamped in parallel by the clamp.

[0008] 3. Adjust the tightening screws to press against the sides of the corresponding measuring claws to eliminate the clearance between the measuring screw and the threaded bushing of the internal micrometer.

[0009] 4. Lower the clamp and insert the left and right measuring rods into the left and right rod holes, respectively. Secure the corresponding measuring rods firmly in the rod holes with glue, and then remove the clamp.

[0010] The second technical solution for the assembly device for ensuring the parallelism of the measuring surfaces of an internal micrometer, which can solve the problems of existing technologies, includes a base plate, but differs in that:

[0011] 1. The base plate is provided with a positioning plate, and the left and right ends of the positioning plate are provided with a left clamping member and a right clamping member.

[0012] 2. Place the left measuring jaw II and right measuring jaw II of the internal micrometer against the parallel left and right end faces of the positioning plate, respectively. Use the left clamping device to press the left part of the positioning plate and the left measuring jaw II onto the base plate, and use the right clamping device to press the right part of the positioning plate and the right measuring jaw II onto the base plate.

[0013] 3. The left measuring jaw II is mounted on the connecting sleeve, the right measuring jaw II is mounted on the threaded bushing, the connecting sleeve has an intermediate sleeve in the sleeve hole, the intermediate sleeve is mounted on the measuring screw, and the measuring screw is fitted into the threaded bushing.

[0014] 4. Rotate the differential drum to extend the measuring screw out of the threaded bushing until the intermediate sleeve abuts against the bottom of the connecting sleeve hole. Rotate the force measuring knob to apply force to the measuring screw and eliminate the fit clearance between it and the threaded bushing.

[0015] 5. After firmly attaching the intermediate sleeve to the sleeve hole of the connecting sleeve with glue, loosen the left and right clamping parts and remove the inner micrometer.

[0016] The beneficial effects of this utility model are:

[0017] The parallelism assembly device for the measuring surfaces of the internal micrometer of this utility model simulates the stress state when the internal micrometer is in use, eliminates the fit clearance between the measuring screw and the threaded bushing, and ensures that the parallelism of the measuring surfaces of the internal micrometer meets the requirements of national standards when in use. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the first type of internal measuring micrometer.

[0019] Figure 2 This is a structural diagram of the second type of internal micrometer.

[0020] Figure 3 This is a schematic diagram of the structure of the first embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the second embodiment of the present invention.

[0022] Part Number Identification: 1. Base; 2. Locking Frame; 3. Upright Plate; 4. Left Tightening Screw; 5. Right Tightening Screw; 6. Threaded Bushing; 7. Left Measuring Jaw I; 8. Right Measuring Jaw I; 9. Measuring Screw; 10. Left Measuring Rod; 11. Right Measuring Rod; 12. Clamp; 13. Rod Hole; 14. Micrometer Tube; 15. Force Measuring Knob; 16. Scale Sleeve; 17. Base Plate; 18. Positioning Plate; 19. Left Clamping Component; 20. Right Clamping Component; 21. Left Measuring Jaw II; 22. Right Measuring Jaw II; 23. Connecting Sleeve; 23-1. Sleeve Hole; 24. Intermediate Sleeve; 25. Set Screw. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the embodiments shown in the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of an internal micrometer (for measuring small-diameter bores), including a left measuring jaw 7, a right measuring jaw 8, a threaded sleeve 6, a measuring screw 9, a scale sleeve 16, a micrometer tumbler 14, and a force-measuring knob 15. The threaded sleeve 6 includes coaxial inner holes (guide holes) and threaded holes. The measuring screw 9 is fitted inside the threaded sleeve 6, with the threaded section on the right side of the measuring screw 9 screwed into the threaded hole, and the guide section on the left side of the measuring screw 9 slidingly fitted into the guide hole. The left measuring claw 7 is installed on the extended end (left end) of the measuring screw 9 and extends to the left of the threaded bushing 6. The right measuring claw 8 is installed on the left side of the threaded bushing 6. The corresponding measuring rod is assembled in the rod hole 13 on the top of each measuring claw. The scale sleeve 16 is coaxially fitted and fixed to the right side of the threaded bushing 6. The differential cylinder 14 is fitted on the right side of the scale sleeve 16 and coaxially fixed to the measuring screw 9. The force measuring knob 15 is coaxially installed on the right end of the differential cylinder 14.

[0025] Implementation Method 1:

[0026] The parallelism assembly device for the measuring surface of the internal micrometer of this utility model is as follows: Figure 3 As shown, it includes a base 1, a locking frame 2 and a vertical plate 3. The locking frame 2 is installed on the right side of the base 1, and the vertical plate 3 is installed on the left side of the base 1 and is located behind the locking frame 2. The upper part of the front face of the vertical plate 3 is provided with a left screw seat and a right screw seat. A left tightening screw 4 facing to the right is screwed into the left screw seat, and a right tightening screw 5 facing to the left is screwed into the right screw seat.

[0027] The assembly method of the left measuring rod 10 and the right measuring rod 11 is as follows:

[0028] 1. Mount the scale sleeve 16 of the internal micrometer onto the locking frame 2, so that the upper parts of the left measuring jaw 7 and the right measuring jaw 8 are between the left tightening screw 4 and the right tightening screw 5, with the right measuring jaw 8 close to the right tightening screw 5.

[0029] 2. Rotate the differential drum 14 to extend the measuring screw 9 out of the threaded bushing 6, move the left measuring jaw 7 to the left and close to the left tightening screw 4, and then lock the threaded bushing 6.

[0030] 3. Adjust the left tightening screw 4 to the right so that it is pressed against the left side of the left measuring jaw 7, and adjust the right tightening screw 5 to the left so that it is pressed against the right side of the right measuring jaw 8, forcing the measuring screw 9 to tilt inside the threaded bushing 6, simulating the state when the internal micrometer is in use, thereby eliminating the fit clearance between the guide section of the measuring screw 9 and the guide hole of the threaded bushing 6.

[0031] 4. Clamp the left measuring rod 10 and the right measuring rod 11 parallel to each other on the bottom of the fixture 12, and align the left and right measuring rods 10 and 11 with the left and right rod holes 13 on the left and right measuring claws 7 and 8 respectively.

[0032] 5. Inject glue into the left and right rod holes 13.

[0033] 6. Lower the clamp 12 and place the left and right measuring rods 10 and 11 into the left and right rod holes 13. After the glue dries and firmly bonds the measuring rods, remove the clamp 12.

[0034] Figure 2 This is a schematic diagram of another structure for an internal micrometer (measuring a large range of apertures), including a left measuring jaw II 21, a right measuring jaw II 22, a connecting sleeve 23, an intermediate sleeve 24, a threaded bushing 6, a measuring screw 9, a scale sleeve 16, a micrometer tumbler 14, and a force measuring knob 15. The threaded bushing 6 includes coaxial inner holes (guide holes) and threaded holes on the left and right sides. The measuring screw 9 is fitted inside the threaded bushing 6. The threaded section on the right side of the measuring screw 9 is screwed into the threaded hole, and the guide section on the left side of the measuring screw 9 is slidably fitted into the guide hole and extends to the left from the threaded hole. The threaded bushing 6 has an intermediate sleeve 24 installed at the left end of the measuring screw 9, a right measuring jaw II 22 installed at the left side of the threaded bushing 6, a left measuring jaw II 21 installed at the left end of the connecting sleeve 23, and an intermediate sleeve 24 located in the sleeve hole 23-1 at the right end of the connecting sleeve 23 and locked in position by a set screw 25. The scale sleeve 16 is coaxially fitted and fixed to the right side of the threaded bushing 6, the micrometer cylinder 14 is fitted to the right side of the scale sleeve 16 and coaxially fixed to the measuring screw 9, and the force measuring knob 15 is coaxially installed at the right end of the micrometer cylinder 14.

[0035] Implementation Method Two:

[0036] The parallelism assembly device for the measuring surface of the internal micrometer of this utility model is as follows: Figure 4 As shown, it includes a base plate 17, on which a positioning plate 18 (with parallel left and right end faces) is provided. A left clamping member 19 is provided on the left end of the positioning plate 18, and a right clamping member 20 is provided on the right end of the positioning plate 18.

[0037] The assembly method of intermediate sleeve 24 and connecting sleeve 23 is as follows:

[0038] 1. Place the internal micrometer on the base plate 17 so that the left measuring jaw II 21 and the right measuring jaw II 22 are respectively positioned on the left and right sides of the positioning plate 18.

[0039] 2. Loosen the set screw 25 so that the intermediate sleeve 24 and the connecting sleeve 23 are in a loose state, and inject glue into the sleeve hole 23-1 of the connecting sleeve 23.

[0040] 3. Place the left measuring jaw II 21 and the right measuring jaw II 22 against the left and right end faces of the positioning plate 18, which are parallel to each other, and use the left and right clamping parts 19 and 20 to press the left measuring jaw II 21 and the right measuring jaw II 22 against the base plate 17, so as to ensure that the measuring surfaces of the left and right measuring jaw II 21 and 22 are parallel.

[0041] 4. Rotate the micrometer drum 14 to extend the measuring screw 9 out of the threaded bushing 6 until the intermediate sleeve 24 abuts against the bottom of the sleeve hole 23-1 of the connecting sleeve 23. Rotate the force measuring knob 15 to apply force to the measuring screw 9 (the intermediate sleeve 24 is pressed tightly against the sleeve hole 23-1), simulating the use state of the internal micrometer, so that the guide section of the measuring screw 9 is tilted in the guide hole of the threaded bushing 6, thereby eliminating the fit clearance between the guide section and the guide hole.

[0042] 5. After the glue has dried and solidified, firmly bond the intermediate sleeve 24 to the sleeve hole 23-1 of the connecting sleeve 23, loosen the left clamping member 19 and the right clamping member 20, and remove the inner micrometer.

Claims

1. An assembly device for ensuring the parallelism of the measuring surfaces of an internal micrometer, comprising a base (1), characterized in that: A locking frame (2) is provided on the left or right side of the base (1), and a vertical plate (3) is provided on the right or left side of the base (1) behind the locking frame (2). A left tightening screw (4) and a right tightening screw (5) are provided on the vertical plate (3). The locking frame (2) clamps the scale sleeve (16) of the internal micrometer so that the left measuring jaw I (7) and the right measuring jaw I (8) of the internal micrometer are between the left tightening screw (4) and the right tightening screw (5). Each measuring jaw has a rod hole (13) on its top. Corresponding to the left and right rod holes (13), there are left measuring rods (10) and right measuring rods (11) that are clamped in parallel by the clamp (12). Adjust each tightening screw (4) to press against the side of the corresponding measuring claw to eliminate the fit clearance between the measuring screw (9) of the internal micrometer and the threaded bushing (6); Lower the clamp (12) and insert the left measuring rod (10) and the right measuring rod (11) into the left and right rod holes (13). After firmly attaching the corresponding measuring rods in each rod hole (13) with glue, remove the clamp (12).

2. An assembly device for ensuring the parallelism of the measuring surfaces of an internal micrometer, comprising a base plate (17), characterized in that: The base plate (17) is provided with a positioning plate (18), and the left and right ends of the positioning plate (18) are respectively provided with a left clamping member (19) and a right clamping member (20); Place the left measuring jaw II (21) and the right measuring jaw II (22) of the internal micrometer against the left and right end faces of the positioning plate (18), which are parallel to each other. Press the left part of the positioning plate (18) and the left measuring jaw II (21) onto the base plate (17) by the left clamping member (19), and press the right part of the positioning plate (18) and the right measuring jaw II (22) onto the base plate (17) by the right clamping member (20). The left measuring jaw II (21) is mounted on the connecting sleeve (23), the right measuring jaw II (22) is mounted on the threaded bushing (6), the connecting sleeve (23-1) has an intermediate sleeve (24), the intermediate sleeve (24) is mounted on the measuring screw (9), and the measuring screw (9) is fitted into the threaded bushing (6); Rotate the differential drum (14) to extend the measuring screw (9) out of the threaded bushing (6) until the intermediate sleeve (24) abuts against the bottom of the bushing hole (23-1) of the connecting sleeve (23). Rotate the force measuring knob (15) to apply force to the measuring screw (9) and eliminate the fit clearance between it and the threaded bushing (6). After firmly attaching the intermediate sleeve (24) to the sleeve hole of the connecting sleeve (23) with glue, loosen the left clamping part (19) and the right clamping part (20) and remove the inner micrometer.

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