Small-specification screw end inner hole trafficability testing device

Abstract

The utility model discloses a small-specification screw end inner hole trafficability testing device, a screw end is provided with a driving inner hole of a polygonal structure, the testing device comprises a driving opener adaptively embedded in the driving inner hole, and the driving opener is provided with a cleaning member for removing sweeps adhered in the driving inner hole. And a grinding structure for grinding the inner wall surface of the driving inner hole is also arranged on the driving opener. According to the screw driving device, the cleaning component can be used for effectively cleaning scraps in the driving inner hole in the passing performance inspection process, so that the screw can be a qualified product after cleaning, the waste rate and the machining cost are reduced, and meanwhile, the influence caused in the later use process is also avoided. And the hole wall of the driving inner hole can be ground through the grinding structure after cleaning is completed, so that the problem that the inner wall surface is uneven due to adhesion of sweeps is solved, and the quality of the hole wall is improved.

Description

Technical Field

[0001] This application relates to the field of small-size screw processing technology, and in particular to a device for testing the passability of the inner hole at the end of a small-size screw. Background Technology

[0002] The small-diameter screw structure is shown in the attached instruction manual. Figure 1 As shown, small-diameter screws, with their small outer diameter and long axial length, are widely used in various fields. For example, in the manufacturing process of electronic products, small-diameter screws are often used to connect and fix various electronic components, ensuring the stability and reliability of the product. Instruments and meters typically have small size and complex structures; small-diameter screws can flexibly adapt to these requirements, achieving precise assembly and fixing. In small machinery, small-diameter screws are often used to connect and transmit components, ensuring the normal operation and performance of the machinery.

[0003] In the process of fastening a small-diameter screw to an internally threaded hole or nut, in order to achieve the rotational drive of the small-diameter screw, such as... Figure 2 As shown, a drive bore (a blind hole structure with a certain depth) is usually machined at its end. Due to the small size of the screw, the matching drive actuator is also small. Therefore, in order to achieve a higher driving force, such as Figure 2 As shown, its driving inner hole is usually a polygonal (such as octagonal, decagonal, etc.) inner hole structure larger than hexagonal (large-diameter driving holes are usually hexagonal structures). In order to improve the contact surface of the driving actuator, the driving inner hole is usually machined into a staggered hole structure.

[0004] Currently, when machining the drive inner hole of small-diameter screws, the small hole diameter limits the radial depth of the spline sides. Insufficient machining dimensions reduce the contact area between the drive starter and each side, affecting the stability of the rotary drive after insertion and potentially grinding down the sides of the drive inner hole, making rotary drive difficult. Currently, after machining, manual insertion of the drive starter into the drive inner hole is required to check the hole's passability and ensure the machining quality meets requirements. However, the following problems exist during the passability check process:

[0005] 1) Excessive cutting of the side edges of the drive bore, such as... Figure 3 The state shown at the dotted circle makes the inner hole nearly circular, and thus does not have relative limit when rotating after being matched with the drive starter. This machining state is usually discarded directly.

[0006] 2) During internal hole machining, due to the small cutting depth, the chips cannot be completely separated from the inner hole wall, resulting in a certain degree of adhesion. Figure 4In the shown state, the adhered scrap cannot be cleaned, and the scrap is pressed on the inner hole side wall, affecting the smooth insertion of the driving opener, i.e. the insertion depth;

[0007] 3) During the cutting of the inner hole, the temperature rise during cutting causes the scrap to adhere to the inner hole bottom surface, as shown in the shown state, the inner hole diameter is small, and it is difficult to clean it, which affects the insertion depth of the driving opener in the later period. Figure 5 SUMMARY

[0008] In view of the above problems, the present application aims to provide a small size screw rod end hole passability testing device, which can effectively clean the scrap in the driving inner hole during passability inspection, so that the screw rod can be a qualified product after cleaning, reducing the scrap rate and processing cost, and also avoiding the influence in the later use.

[0009] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: a small size screw rod end hole passability testing device, the screw rod end is provided with a driving inner hole with a polygonal structure, the testing device comprises a driving opener embedded in the driving inner hole, characterized in that: a cleaning member for removing the adhered scrap in the driving inner hole is arranged on the driving opener, and a grinding structure for grinding the inner wall surface of the driving inner hole is also arranged on the driving opener.

[0010] Preferably, the cleaning member is a spring cone arranged at the center of the end of the driving opener, and the length of the spring cone extending out of the end of the driving opener is greater than the length of the driving opener inserted into the driving inner hole.

[0011] Preferably, the cleaning member further comprises a barb opening formed on the side wall of the driving opener.

[0012] Preferably, the grinding structure is a grinding surface that sets the side wall surface of the driving opener to a rough structure.

[0013] The beneficial effects of the present application are: through the cleaning member, the scrap in the driving inner hole can be effectively cleaned during passability inspection, so that the screw rod can be a qualified product after cleaning, reducing the scrap rate and processing cost, and also avoiding the influence in the later use. And through the grinding structure, the hole wall of the driving inner hole can be ground after cleaning, to solve the problem of uneven inner wall surface caused by scrap adhesion, thereby improving the quality of the hole wall. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a small size screw structure diagram.

[0015] Figure 2 It is a small size screw rod end structure diagram.​

[0016] Figure 3 For the current processing leads to the inner hole side wall tends to circular structure diagram.

[0017] Figure 4 For the current processing leads to the existence of inner hole side wall adhesion scrap diagram.

[0018] Figure 5 For the current processing leads to the existence of inner hole bottom adhesion scrap diagram.

[0019] Figure 6 For the current processing leads to the insertion of the drive son into the drive hole through the inspection diagram.

[0020] Figure 7 For Figure 6 Structure diagram of A in the middle.

[0021] Figure 8 For Figure 7 The drive son is inserted into the drive hole diagram based on the.

[0022] Figure 9 For the application in the end of the drive son set spring cone diagram.

[0023] Figure 10 For the application of spring cone on the inner bottom surface of the drive hole to remove scrap diagram.

[0024] Figure 11 For the application of extrusion spring cone retraction through the inspection diagram.

[0025] Figure 12 For the application of setting barbed mouth diagram.

[0026] Figure 13 For the application of setting grinding surface diagram.

[0027] Figure: b-scrap. DETAILED DESCRIPTION

[0028] In order to make those skilled in the art better understand the technical scheme of the present application, the technical scheme of the present application is further described below in combination with the drawings and examples.

[0029] Referring to the drawings Figures 1 to 13 The small size screw rod end hole through the test device is shown, the screw rod 1 end head is provided with a driving inner hole 1a of polygonal structure, the test device includes a driving son 2 embedded in the driving inner hole 1a, at present, by inserting the end of the driving son 2 into the driving inner hole 1a of the screw rod 1, the processing quality of the driving inner hole 1a is directly obtained according to the insertion state of the driving son 2, such as observing whether it is smooth when inserted, and whether the insertion depth is up to standard.

[0030] And for the driving hole 1a wall adhesion of waste, and the bottom of the accumulation of waste state after cleaning, so that the screw 1 can not be discarded and can be used, such as Figure 9 As shown in the driving sub 2 is provided with the cleaning member to remove the driving hole 1a adhesion of waste, through the cleaning member in the process of through the inspection can be effective in the driving hole 1a waste cleaning, so that the screw is qualified after cleaning products, reduce the scrap rate and processing cost, but also avoid the impact of the use of the process in the later period.

[0031] And to further improve the driving hole 1a hole quality, such as Figure 13 As shown in the driving sub 2 is provided with the grinding structure to grinding the driving hole 1a wall surface. Through the grinding structure can be after the above cleaning to the driving hole 1a hole wall grinding, to solve the problem of uneven wall surface due to the adhesion of waste, so as to improve the quality of the hole wall.

[0032] Specifically, as shown in Figure 9 The cleaning member is a spring cone 3 provided at the center of the end of the driving sub 2, and the length of the spring cone 3 extending out of the end of the driving sub 2 is greater than the length of the driving sub 2 inserted into the driving hole 1a. The operation process is shown in Figure 10 Before the through inspection, the driving sub 2 is driven, so that the spring cone 3 extending out of the end of the driving sub 2 is inserted into the driving hole 1a. Since the length of the spring cone 3 extending out of the end of the driving sub 2 is greater than the length of the driving sub 2 inserted into the driving hole 1a, as shown in Figure 10 The end of the spring cone 3 is in contact with the bottom of the driving hole 1a, and the driving sub 2 is still outside the driving hole 1a, and the outer diameter of the spring cone 3 is less than the inner diameter of the driving hole 1a, so that Figure 10 As shown in the rotation arrow, the driving sub 2 is inclined to rotate, and the spring cone 3 is driven to contact the adhesion of waste on the bottom of the driving hole 1a, and the adhesion of waste is separated from the bottom of the driving hole 1a, and then the end of the driving hole 1a is downward, and the adhesion of waste after separation can be cleaned.

[0033] Then in the process of through the inspection, the end of the driving sub 2 is inserted into the driving hole 1a in the axial direction, and the spring cone 3 is extruded to retract into the driving sub 2, and the through property of the driving hole 1a is detected by the fitting of the side wall of the driving sub 2 and the inner wall of the driving hole 1a.

[0034] For cleaning the adhesion of waste on the inner wall of the driving hole 1a, as shown in Figure 12As shown, the cleaning member further comprises a barb opening 2a formed on the side wall of the driving opener 2. In operation, the driving opener 2 is inserted into the driving inner hole 1a and then moved reversely. During the movement, the waste adhered to the inner wall will be clamped into the barb opening 2a. By moving the driving opener 2 outward, the waste can be separated from the hole wall, thereby further realizing the cleaning operation of the waste adhered to the hole wall.

[0035] After the waste is cleaned, the smoothness of the hole wall surface is poor. In order to improve the smoothness of the hole wall surface, the grinding structure is provided. Figure 13 As shown, the grinding structure is a grinding surface formed on the side wall of the driving opener 2. The surface of the grinding surface is similar to the surface structure of a grinding wheel. By inserting the driving opener 2 into the driving inner hole 1a and contacting the hole wall surface (axial reciprocating) through the grinding surface, the grinding operation of the hole wall surface is realized, and the smoothness of the hole wall surface is improved. For the case that the waste adhered to the hole wall cannot be effectively cleaned through the barb opening 2a, the waste adhered to the hole wall surface can also be ground and removed through multiple grinding of the grinding surface.

[0036] The principle of the present application is that, before the passability inspection is performed, the driving opener 2 is driven to make the spring cone 3 extending from the end thereof first inserted into the driving inner hole 1a. After the end of the spring cone 3 contacts the inner bottom surface of the driving inner hole 1a, the driving opener 2 is inclined and rotated, thereby driving the spring cone 3 to contact the waste adhered to the inner bottom surface of the driving inner hole 1a, and driving the adhered waste to separate from the inner bottom surface of the driving inner hole 1a. Then, the end of the driving inner hole 1a is downwardly moved, and the separated adhered waste can be poured and cleaned.

[0037] For cleaning the waste adhered to the hole wall, the driving opener 2 is inserted into the driving inner hole 1a and then moved reversely. During the movement, the waste not separated from the inner wall will be clamped into the barb opening 2a. By moving the driving opener 2 outward, the waste can be separated from the hole wall, thereby further realizing the cleaning operation of the waste adhered to the hole wall.

[0038] Then, during the passability inspection, the end of the driving opener 2 is axially inserted into the driving inner hole 1a to press the spring cone 3 and make it retract into the driving opener 2. The passability of the driving inner hole 1a is detected by the fitting condition of the side wall of the driving opener 2 and the inner wall of the driving inner hole 1a. At the same time, the inner wall surface of the driving inner hole 1a is ground by the grinding surface of the driving opener 2 through the axial reciprocating movement of the driving opener 2, so as to improve the smoothness of the inner wall surface.

[0039] The basic principles, main features and advantages of the present application are shown and described above. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application.

Claims

1. A small size screw end hole passability testing device, the screw (1) end is provided with a polygonal structure driving hole (1a), the testing device comprises a driving key (2) embedded in the driving hole (1a), characterized in that: The driving key (2) is provided with a cleaning member for removing the waste adhesion in the driving hole (1a), and the driving key (2) is also provided with a grinding structure for grinding the inner wall of the driving hole (1a).

2. The passability testing device of claim 1, wherein: The cleaning member is a spring cone (3) arranged at the center of the end of the driving key (2), and the length of the spring cone (3) extending out of the end of the driving key (2) is greater than the length of the driving key (2) inserted into the driving hole (1a).

3. The passability testing device of claim 2, wherein: The cleaning member further comprises a barb opening (2a) opened on the side wall of the driving key (2).

4. The passability testing device of claim 3, wherein: The grinding structure is a grinding surface that sets the side wall of the driving key (2) as a rough structure.

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