Milling fixture for aligning keyway center with tooth center

Abstract

The utility model relates to the field of mechanical processing technology, and in particular to a milling groove fixture for aligning the center of a keyway with the center of a tooth, comprising a base plate, a plurality of workstations are arranged on the base plate, and both ends of the axial direction of each of the workstations are provided with a V-block for placing a part to be processed and a clamping unit for pressing the part to be processed onto the V-block, and each of the workstations is provided with a tooth groove positioning unit and a tooth groove inspection unit, the tooth groove positioning unit is located below one of the external teeth and is used to position the tooth groove according to a gear rolling mark, and the tooth groove inspection unit is located above the other external tooth and is used to check whether the gear rolling mark is correct; the advantage is that for the processing of double external tooth type gear shaft parts, clamping and fastening and accurate positioning can be done, and a tooth groove inspection unit is added at the same time to check whether the mark of the previous process is correct, so as to further ensure the alignment of the tooth groove center and the keyway center.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing technology, in particular to a slot milling fixture used for processing the alignment of a key slot center and a tooth center. Background Art

[0002] In mechanical processing, keyway processing is a common machining method. It is usually processed by using a keyway milling cutter after positioning and clamping with a V-block. During processing, the dimensional accuracy and symmetry requirements of the keyway must be ensured. When processing such parts, the gear part is usually processed first, and then the gear part is used for positioning, a special fixture is designed, and the keyway part is processed.

[0003] like Figure 1 and Figure 2 As shown in the figure, it is a part drawing that needs to be processed. The part includes a gear shaft. One end of the gear shaft has two external teeth with tooth numbers Z16 and Z17. During processing, the centers of the tooth grooves of the two external teeth are required to be aligned. This is ensured by the fixture during gear rolling. When processing the keyway, the center of the keyway on the shaft is required to be aligned with the center of the tooth groove of one tooth, which has higher precision requirements for processing.

[0004] At present, in order to improve the processing efficiency and processing accuracy, the focus is on streamlining the internal structure of parts and improving the processing requirements of parts, but few improvements are made on processing fixtures. Based on this, this case is proposed. Utility Model Content

[0005] The utility model aims to provide a slot milling fixture for machining a key slot center and a tooth center to align, and improve the machining efficiency and machining accuracy by improving the fixture.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A milling fixture for aligning the center of a keyway with the center of a tooth, wherein the part to be processed comprises two external teeth, and the external teeth are provided with a gear rolling mark for indicating that the centers of the tooth grooves of the two external teeth are aligned; the fixture comprises a base plate, and a plurality of workstations are provided on the base plate, and both axial ends of each of the workstations are provided with a V-block for placing the part to be processed and a clamping unit for clamping the part to be processed on the V-block, and each of the workstations is provided with a gear groove positioning unit and a gear groove inspection unit, wherein the gear groove positioning unit is located below one of the external teeth and is used to position the gear groove according to the gear rolling mark, and the gear groove inspection unit is located above another external tooth and is used to inspect whether the gear rolling mark is correct.

[0008] Furthermore, the tooth groove positioning unit includes a positioning sleeve, a positioning piece and a spring. A positioning mounting groove is provided on the base plate. The positioning sleeve is fixed on the base plate and coaxially arranged with the positioning mounting groove. The positioning piece is slidably connected with the positioning sleeve. The bottom end of the positioning piece is located in the positioning mounting groove. A positioning head is provided at the top end for inserting into one of the external tooth grooves. The spring is installed between the positioning mounting groove and the positioning piece for lifting the positioning piece upward.

[0009] Furthermore, the tooth groove inspection unit includes a guide column and a check block, the bottom end of the guide column is fixed to the bottom plate, and the check block is provided with a guide hole for inserting the guide column and a check head for inserting another external tooth groove.

[0010] Furthermore, the clamping unit adopts an angle cylinder.

[0011] Furthermore, an oil circuit for controlling the corner oil cylinder is provided in the base plate.

[0012] Furthermore, a reference line is provided on the side of the base plate for facilitating installation and positioning with the machine tool.

[0013] The advantages of the utility model are:

[0014] 1. For the processing of double external gear shaft parts, the clamping and fastening and positioning can be done accurately. At the same time, a tooth groove inspection unit is added. While playing a positioning role, it can also check whether the marking of the previous process is correct, and further ensure the alignment of the tooth groove center and the keyway center;

[0015] 2. The fixture is simple and compact as a whole, and the oil circuit for controlling the clamping device is set inside the fixture bottom plate, further enhancing the simplicity and compactness of the fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a three-dimensional structure of a part to be processed in the background technology;

[0017] Figure 2 for Figure 1 A front view schematic diagram of

[0018] Figure 3 A schematic diagram of the three-dimensional structure of the slot milling fixture in the embodiment;

[0019] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure from another perspective;

[0020] Figure 5 for Figure 3 A side view schematic diagram of

[0021] Figure 6 for Figure 3 A top view schematic diagram of

[0022] Figure 7 This is a front view of the bottom plate of the slot milling fixture in the embodiment;

[0023] Figure 8 It is a schematic diagram of the back side of the bottom plate of the slot milling fixture in the embodiment;

[0024] Fig. 9 A schematic diagram of the side surface of the bottom plate of the slot milling fixture in the embodiment;

[0025] Fig.10 for Fig. 9 AA cross-sectional view in FIG.

[0026] Fig.11 for Fig. 9 BB cross-sectional view in FIG.

[0027] Fig.12 for Figure 1 Schematic diagram of the state of the parts being clamped in the slot milling fixture;

[0028] Fig.13 for Fig.12 A side view schematic diagram of

[0029] Fig.14 for Fig.13 Schematic diagram of CC cross section in FIG.

[0030] Description of symbols

[0031] 1. Parts to be processed; 101. External gear Z16; 102. External gear Z17; 103. Keyway; 2. Bottom plate; 201. Oil circuit; 202. Oil inlet and oil unloading channels; 203. V-block mounting groove; 204. Positioning mounting groove; 205. Guide column mounting groove; 3. Clamping unit; 4. Tooth groove positioning unit; 401. Positioning sleeve; 402. Positioning piece; 403. Spring; 5. Tooth groove inspection unit; 501. Guide column; 502. Inspection block; 503. Inspection head; 6. V-block. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the embodiments. It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. used in the text to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0033] This embodiment provides a milling fixture for machining the keyway center and the tooth center to align. Figures 3 to 11As shown, it includes a base plate 2 on which two workstations are arranged, and each workstation includes two pressing units 3, two V-blocks 6, a tooth groove positioning unit 4 and a tooth groove inspection unit 5.

[0034] The two clamping units 3 are respectively arranged at the two ends of the workstation axial direction, and adopt angle cylinders. The one located on the left side of the bottom plate 2 is the right rotation angle clamping cylinder, and the one located on the right side of the bottom plate 2 is the left rotation angle clamping cylinder. Figure 7 , Fig.10 and Fig.11 Corresponding screw holes are provided on the bottom plate 2, and the corner cylinder is fastened to the bottom plate 2 by cylinder pads, bolts, etc. At the same time, in order to make the fixture structure more compact and streamlined, the present embodiment also provides an oil circuit 201 for controlling the corner cylinder in the bottom plate 2 to realize oil inlet and oil unloading.

[0035] The bottom plate 2 is provided with a V-block mounting groove 203, and the two V-blocks 6 on the station are positioned in cooperation with the V-block mounting groove 203 and fixedly connected with the bottom plate 2 by bolts. The two V-blocks 6 are respectively arranged at both ends of the station axial direction for supporting the parts to be processed.

[0036] like Figure 7 , Fig.13 and Fig.14 As shown, the tooth groove positioning unit 4 includes a positioning sleeve 401, a positioning member 402 and a spring 403. The bottom plate 2 is provided with a positioning installation groove 204. The positioning sleeve 401 is fixed on the bottom plate 2 and is coaxially arranged with the positioning installation groove 204. The positioning member 402 is slidably connected with the positioning sleeve 401. The bottom end of the positioning member 402 is located in the positioning installation groove 204, and the top end is provided with a positioning head for inserting the outer tooth Z16 tooth groove. The spring 403 is installed between the positioning installation groove 204 and the positioning member 402, and is used to push the positioning member 402 upward. Through the force of the spring 403, when clamping parts, the positioning member 402 can move up and down without blocking.

[0037] like Figure 4 , Figure 5 and Figure 7 As shown, the tooth groove inspection unit 5 includes a guide column 501 and a check block 502, the bottom end of the guide column 501 is fixed to the bottom plate 2, and the check block 502 is provided with a guide hole for inserting the guide column 501 and a check head 503 for inserting the tooth groove of the external tooth Z17. In this embodiment, two workstations share two guide columns 501 and one check block 502, and at the same time, guide holes that can cooperate with the guide columns 501 are provided at both ends of the check block 502, so that the check block 502 can slide up and down along the guide column 501, and the bottom surface of the check block 502 is provided with a check head 503 corresponding to the two workstations one by one.

[0038] The implementation of the fixture is as follows:

[0039] S1. Place the processed parts of the external gears Z16 and Z17 on the V-block 6;

[0040] S2. According to the hobbing mark, align the positioning head on the lower positioning member 402 and insert it into the tooth groove of the external tooth Z16;

[0041] S3. Insert the inspection block 502 through the guide hole into the guide column 501, slide the inspection block 502 down, and observe whether the inspection head 503 on the inspection block 502 is inserted into the tooth groove of the external gear Z17. If not, it means that the hobbing mark is incorrectly marked; if inserted, it means that the hobbing mark is correctly marked;

[0042] Press the check block 502 by hand and step on the hydraulic controller to turn the pressing plate of the angle cylinder and press the parts to ensure that the gear shaft is completely pressed and not loose during the keyway milling process;

[0043] S4. Perform keyway milling process.

[0044] Preferably, the side of the base plate 2 of this embodiment is provided with a reference line for facilitating installation and positioning with the machine tool, so as to facilitate debugging of the fixture and the machine tool after installation.

[0045] The above embodiments are only used to explain the concept of the present invention, rather than to limit the protection of the present invention. Any non-substantial changes to the present invention using this concept shall fall within the protection scope of the present invention.

Claims

1. A milling fixture for machining a keyway center to align with a tooth center, wherein the part to be machined includes two external teeth, and the external teeth are provided with a hobbing mark for indicating that the centers of the tooth grooves of the two external teeth are aligned; characterized in that: It comprises a base plate, on which a plurality of workstations are arranged, each of the two axial ends of the workstation being provided with a V-block for placing the workpiece to be processed and a clamping unit for clamping the workpiece to be processed onto the V-block, each of the workstation being provided with a tooth groove positioning unit and a tooth groove inspection unit, the tooth groove positioning unit being located below one of the external teeth and being used for positioning the tooth groove according to the gear hobbing mark, the tooth groove inspection unit being located above the other external tooth and being used for inspecting whether the gear hobbing mark is correct.

2. A slot milling fixture for aligning the keyway center with the tooth center as claimed in claim 1, characterized in that: The tooth groove positioning unit includes a positioning sleeve, a positioning piece and a spring. A positioning mounting groove is provided on the base plate. The positioning sleeve is fixed on the base plate and coaxially arranged with the positioning mounting groove. The positioning piece is slidably connected with the positioning sleeve. The bottom end of the positioning piece is located in the positioning mounting groove. A positioning head for inserting into one of the outer tooth grooves is provided at the top end. The spring is installed between the positioning mounting groove and the positioning piece for lifting the positioning piece upward.

3. A slot milling fixture for aligning the keyway center with the tooth center as claimed in claim 1, characterized in that: The tooth groove inspection unit comprises a guide column and an inspection block. The bottom end of the guide column is fixed to the bottom plate. The inspection block is provided with a guide hole for inserting the guide column and an inspection head for inserting another external tooth groove.

4. A slot milling fixture for aligning the keyway center with the tooth center as claimed in claim 1, characterized in that: The pressing unit adopts an angle cylinder.

5. A slot milling fixture for aligning the keyway center with the tooth center as claimed in claim 4, characterized in that: An oil circuit for controlling the corner oil cylinder is arranged in the bottom plate.

6. A slot milling fixture for aligning the keyway center with the tooth center as claimed in claim 1, characterized in that: The side of the bottom plate is provided with a reference line for facilitating installation and positioning with the machine tool.

Images