Machining positioning device and machining system for bearing mounting hole in pull rod

Abstract

The invention discloses a machining positioning device and a machining system for a bearing mounting hole in a pull rod. The device comprises a bottom plate; two studs which are symmetrically distributed left and right are arranged on the bottom plate; the left side and the right side of each stud are each provided with an inclined pressing block set. The upper part of each double-end bolt penetrates through a plate; the part, located above the pressing plate, of each stud is connected with a shoulder nut. A pressing plate is arranged at the top of each inclined pressing block group; the top of the bottom plate is respectively provided with a positioning pad at the front side and the rear side of each set of inclined pressing block group; positioning strips are respectively arranged at the front and rear ends of the top of the bottom plate; the inclined pressing block sets are used for pressing the adjacent pull rod blanks. And each positioning pad is used for placing four pull rod blanks. According to the positioning device, a plurality of to-be-machined pull rod blanks can be conveniently and reliably positioned, the positioning reliability is guaranteed, further machining operation of bearing mounting holes is facilitated, and the machining efficiency is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a processing positioning device and a processing system for a bearing mounting hole on a pull rod. Background Art

[0002] See also Figure 1a to Figure 1d and Figure 2 The pull rod 1 is a transition part of the connecting rod assembly (i.e., connecting rod device) in the switch machine in the field of rail transit technology. A flat rod head 101 is provided on the upper part thereof. A bearing mounting hole 102 is provided at the center of the flat rod head 101. The inner side of the bearing mounting hole 102 is used to mount a spherical bearing 15. In the connecting rod assembly, the pull rod 1 is hinged to the connecting rod joint 17 located at the upper part of the connecting rod assembly through a bolt pin 16 passing through the inner side of the spherical bearing 15.

[0003] A threaded rod 103 is provided at the lower part of the pull rod 1, and a threaded rod lower end surface 104 is provided on the side of the threaded rod 103 away from the flat rod head 101. In the indicating rod connection assembly, its lower end is threadedly connected with an adjusting nut 18 (the adjusting nut has an internal threaded hole) through the threaded rod 103 and is locked by a hexagonal nut 19; in the indicating rod assembly, the function of the connecting rod 1 is to connect the indicating rod joint 17 and the adjusting nut 18, and the indicating rod joint 17 part can rotate around the center of the bearing mounting hole 102 of the connecting rod 1 through the bolt pin 16 and the joint bearing 15.

[0004] See also Figure 3 As shown, in order to process the bearing mounting hole 102 on the tie rod blank 1-0 (the tie rod blank 1-0 is basically the same as the finished tie rod 1, the only difference is that there is no bearing mounting hole 102, and the other parts are the same) to obtain the finished tie rod 1, the processing technology requirements are: it is necessary to use the rod head end face 105 on one side (i.e. one side) of the flat rod head 101, the rod head side face 106 on one side (i.e. one side) and the lower end face 104 of the threaded rod for positioning, and then, perform the processing operation of the bearing mounting hole 102.

[0005] However, due to the small size of the tie rod blank, there is an urgent need to develop a device that can clamp multiple tie rod blanks at the same time and perform processing and positioning operations on multiple tie rod blanks, thereby further improving the processing efficiency of the workpiece. Summary of the invention

[0006] The purpose of the present invention is to provide a processing and positioning device and a processing system for a bearing mounting hole on a pull rod in view of the technical defects in the prior art.

[0007] To this end, the present invention provides a processing and positioning device for a bearing mounting hole on a pull rod, which comprises: a bottom plate, a positioning pad, a positioning strip, a pressure plate, a shoulder nut and a stud bolt, and an oblique pressure block group;

[0008] Two stud bolts are arranged on the bottom plate and are symmetrically distributed on the left and right sides;

[0009] A set of oblique pressure blocks is respectively arranged on the left and right sides of each stud bolt;

[0010] The upper portion of each stud bolt vertically penetrates through a pressure plate;

[0011] The portion of each stud bolt located above the pressure plate is threadedly connected with a shoulder nut;

[0012] A pressure plate is provided on the top of each set of inclined pressure block groups;

[0013] A pressing plate, used for pressing the oblique pressing block group downwards;

[0014] On the top of the bottom plate, a positioning pad is provided on the front and rear sides of each set of oblique pressure block groups;

[0015] A horizontally distributed positioning strip is provided at the front and rear ends of the top of the bottom plate;

[0016] The lower parts of the two positioning pads on the opposite sides abut against the lower parts of the two positioning strips on the opposite sides;

[0017] The inclined pressing block group is located between the two positioning pads and is used to press the adjacent tie rod blanks;

[0018] Each positioning pad is used for placing the flat rod heads of four tie rod blanks and is in contact with the side surface of the rod head on one side of each flat rod head.

[0019] In addition, the present invention also provides a system for processing a bearing mounting hole on a pull rod, comprising the processing and positioning device for the bearing mounting hole on a pull rod as described above, and a milling machine tool processing center;

[0020] The milling machine processing center is used to process the bearing mounting holes of each tie rod blank through the milling cutter thereon to obtain a finished tie rod.

[0021] It can be seen from the technical solution provided by the present invention above that, compared with the prior art, the present invention provides a processing and positioning device and processing system for the bearing mounting hole on the pull rod, which has a scientific structural design and can conveniently and reliably position a plurality of pull rod blanks to be processed, thereby ensuring the reliability of positioning, thereby facilitating further processing operations of the bearing mounting holes of a plurality of workpieces to be processed (i.e., pull rod blanks), ensuring the processing efficiency, and having great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1a , Figure 1b They are the top view and side view of the finished pull rod.

[0023] Figure 1c , Figure 1d Schematic diagrams 1 and 2 respectively represent the connection relationship between the tie rod in the connecting rod assembly and the rod joint;

[0024] Figure 2 : Stereoscopic 3D view of the finished pull rod;

[0025] Figure 3 : A three-dimensional view of the tie rod before processing (i.e., the tie rod blank);

[0026] Figures 4a to 4c : They are respectively a top view, a front view and a side view of a processing and positioning device for a bearing mounting hole on a pull rod provided by the present invention when the pull rod blank is not clamped;

[0027] Figure 5 : A three-dimensional view of a processing and positioning device for a bearing mounting hole on a pull rod provided by the present invention when the pull rod blank is not clamped;

[0028] Figure 6 : A three-dimensional view of a processing and positioning device for a bearing mounting hole on a pull rod provided by the present invention when a pull rod blank has been clamped;

[0029] Figure 7 : A three-dimensional view of a workpiece after processing using the device of the present invention;

[0030] Figures 8a to 8c : The left half of the device of the present invention is equipped with a processed workpiece (i.e., a finished pull rod), and the right half is a top view, a front view and a side view after the pressing plate and the oblique pressing block are removed;

[0031] Fig. 9 : Force decomposition diagram of the oblique pressure block in working state;

[0032] Fig.10 : Stereoscopic three-dimensional view of the baroclinic block group;

[0033] Fig.11a : Top view of the base plate;

[0034] Fig.11b : Along Fig.11a A cross-sectional view of line AA shown;

[0035] Fig.12 : A three-dimensional schematic diagram of the base plate;

[0036] Fig.13a : A top view of the positioning pad at the rear end;

[0037] Fig.13b : Along Fig.13a A cross-sectional view of line BB shown;

[0038] Fig.13c : A front view of the positioning pad at the rear end;

[0039] Fig.14 : A three-dimensional view of the positioning pad at the rear end;

[0040] Fig.15a : A partial front cross-sectional view of the positioning strip at the rear end;

[0041] Fig.15b : A bottom view of the positioning bar at the rear end, i.e., a C-direction schematic view;

[0042] Fig.15c : Side view of the positioning strip at the rear end;

[0043] Fig.16 : Stereoscopic 3D view of the positioning bar at the rear end

[0044] Figures 17a to 17c : They are respectively the top view, side view and cross-sectional view of the baroclinic block;

[0045] Fig.18 : Stereoscopic three-dimensional view of the baroclinic block;

[0046] Figure 19a to Figure 19b : They are respectively the top view and the front view of the pressing plate;

[0047] Fig. 20 : Stereoscopic 3D view of the platen;

[0048] Fig.21a : Top view of the cover;

[0049] Figure 21b : Along Fig.21a A cross-sectional view of line DD shown;

[0050] Fig. 22 : Stereoscopic 3D view of the cover;

[0051] Fig.23 : Stereoscopic 3D view of shoulder nut;

[0052] Fig.24 : Front view of stud bolt;

[0053] In the figure, 1, pull rod; 1-0, pull rod;

[0054] 101, flat rod head; 102, bearing mounting hole; 103, threaded rod; 104, lower end surface of threaded rod; 105, end surface of rod head; 106, side surface of rod head;

[0055] 2. Bottom plate;

[0056] 201, stud bolt mounting hole; 202, cover plate mounting hole; 203, screw spring mounting hole; 204, chip removal hole; 205, positioning strip mounting slot;

[0057] 206, countersunk screw hole; 207, positioning pad mounting screw hole; 208, pin hole; 209, center axis;

[0058] 3. Positioning pad;

[0059] 301, positioning pad mounting hole; 302, positioning pad mounting pin hole; 303, side positioning platform; 304, end positioning surface; 305, side positioning surface; 306, knife exit hole;

[0060] 4. Positioning strip;

[0061] 401, positioning strip mounting hole; 402, small boss; 403, large positioning surface;

[0062] 5. Oblique pressure block;

[0063] 501, screw countersunk hole; 502, inclined pressure surface; 503, lifting surface; 504, upper end surface of inclined pressure block;

[0064] 6. Press plate;

[0065] 601, U-shaped opening; 602, pressure-bearing arc surface;

[0066] 7. Cover plate;

[0067] 701, center hole of cover plate; 702, mounting hole of cover plate;

[0068] 8. Shoulder nut; 9. Stud bolt; 10. Oblique pressure block assembly;

[0069] 11. Hexagon socket screw; 12. Compression spring; 13. Hexagon nut; 14. Countersunk screw. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0072] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0073] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] See also Figure 1a to Figure 1d , Figures 2 to 3 , Figures 4a to 4c , Figures 5 to 7 , Figures 8a to 8c , Figures 9 and 10 , Figure 11a to Figure 11b , Fig.12 , Figures 13a to 13c , Fig.14 , Figures 15a to 15c , Fig.16 , Figure 17a to Figure 17b , Fig.18 , Figure 19a to Figure 19b , Fig. 20 , Figure 21a to Figure 21b , Figure 22 to Figure 24 The present invention provides a processing and positioning device for a bearing mounting hole on a pull rod, comprising: a base plate 2, a positioning pad 3, a positioning strip 4, a pressure plate 6, a shoulder nut 8, a stud bolt 9, and an inclined pressure block group 10;

[0075] Two stud bolts 9 are arranged on the bottom plate 2 and are symmetrically distributed on the left and right sides;

[0076] A set of oblique pressure blocks 10 is respectively arranged on the left and right sides of each stud bolt 9;

[0077] The upper portion of each stud bolt 9 vertically penetrates a pressing plate 6;

[0078] The portion of each stud bolt 9 located above the pressure plate 6 is threadedly connected to a shoulder nut 8;

[0079] A pressing plate 6 is provided at the top of each set of inclined pressing block groups 10;

[0080] A pressing plate 6 is used to press the oblique pressing block group 10 (specifically the oblique pressing block 5 in the oblique pressing block group 10) downwards;

[0081] On the top of the bottom plate 2, a positioning pad 3 is provided on the front and rear sides of each set of inclined pressure block groups 10;

[0082] A transversely distributed positioning strip 4 is provided at the front and rear ends of the top of the bottom plate 2;

[0083] The lower parts of the two positioning pads 3 facing away from each other abut against the lower parts of the two positioning strips 4 facing each other.

[0084] The inclined pressing block group 10 is located between the two positioning pads 3 and is used to press the adjacent tie rod blanks 1 - 0.

[0085] In the present invention, each positioning pad 3 is used to place the flat rod heads 101 of four tie rod blanks 1-0, and is in contact with the rod head side surface 106 on one side of each flat rod head 101 (specifically, it is in contact with the side positioning surface 305 of each side positioning platform 303 of the positioning pad 3);

[0086] The oblique pressing block group 10 (specifically, the oblique pressing surface 505 of the oblique pressing block 5 in the oblique pressing block group 10) is used to press the end of the flat rod head 101 of the adjacent tie rod blank 1-0 away from the threaded rod 103 downward and toward the adjacent positioning strip 4;

[0087] The positioning strip 4 (specifically, the large end positioning surface 403 of the positioning strip 4) is used to abut against (be in close contact with) the threaded rod lower end surface 104 of the threaded rod 103 of the tie rod blank 1-0;

[0088] In the present invention, it should be noted that the present invention adopts an inclined pressure block 5 to pre-tighten the end face of the tie rod blank to be processed (i.e., the rod head end face 105 at the top of the flat rod head 101), as shown in Figure 9, the inclined pressure block 5 contacts the tie rod blank 1-0 (specifically, the connection between the end face of the flat rod head 101 away from the threaded rod 103 and the rod head end face 105) through the inclined pressure surface 504, thereby converting the extrusion force F on the tie rod blank 1-0 formed under the action of the compression spring 12 and directed toward the adjacent positioning strip 4 into a downward pressure F2 and a longitudinal thrust F1 on the workpiece, thereby ensuring the reliability of workpiece positioning in two directions.

[0089] In the present invention, see Fig.11a , Fig.11b and Fig.12 , on the bottom plate 2, two stud bolt mounting holes 201 are provided which are symmetrically distributed on the left and right;

[0090] A set of cover plate mounting hole assemblies are vertically penetrated on the left and right sides of each stud bolt mounting hole 201;

[0091] A screw spring mounting hole 203 is vertically provided at the inner center of each set of cover plate mounting hole combination;

[0092] The screw spring mounting hole 203 is used to accommodate the compression spring 12 and the hexagonal nut 13 in the inclined pressure block assembly 10;

[0093] In a specific implementation, each set of cover plate mounting hole combinations includes four cover plate mounting holes 202;

[0094] Furthermore, the centers of the four cover plate mounting holes 202 are connected in sequence to form a square shape.

[0095] In specific implementation, the bottom plate 2 is vertically penetrated by a chip removal hole 204 on the front and rear sides of each set of cover plate mounting hole combination;

[0096] Furthermore, the bottom plate 2 is provided with a chip removal hole 204 vertically penetrating the front and rear sides of each set of cover plate mounting hole combination;

[0097] The chip removal hole 204 is arranged at a position corresponding to the tool outlet hole 306 on the positioning pad 3;

[0098] The diameter of the chip removal hole 204 is the same as that of the tool outlet hole 306, and is larger than the bearing mounting hole 102 (for example, slightly larger by 1 mm), so as to avoid damaging the bottom plate 2 and the positioning pad 3;

[0099] In specific implementation, the front and rear ends of the upper end surface of the bottom plate 2 are respectively provided with positioning strip mounting grooves 205 distributed transversely;

[0100] Four countersunk screw holes 206 are arranged at equal intervals in the horizontal direction on the positioning bar installation slot 205;

[0101] Furthermore, the bottom plate 2 is vertically provided with two positioning pad mounting screw holes 207 and two pin holes 208 at a position between the positioning bar mounting groove 205 and the chip removal hole 204;

[0102] The two positioning pad mounting screw holes 207 are symmetrically distributed on the left and right sides;

[0103] The two pin holes 208 are symmetrically distributed, and the two positioning pad mounting screw holes 207 are located in the middle between the two pin holes 208 .

[0104] In the present invention, see Fig.10 , the oblique pressure block group 10 includes: an oblique pressure block 5, a cover plate 7, a hexagon socket screw 11, a compression spring 12 and a hexagon nut 13;

[0105] The top of the vertically distributed hexagon socket screw 11 is provided with an oblique pressure block 5;

[0106] A horizontally distributed cover plate 7 is provided on the upper part of the hexagon socket screw 11 below the oblique pressure block 5;

[0107] The lower end of the hexagon socket screw 11 is threadedly connected with a hexagon nut assembly (the hexagon nut assembly includes a plurality of hexagon nuts 13, for example, two);

[0108] A compression spring 12 is provided on the outer side of the hexagon socket screw 11 between the cover plate 7 and the hexagon nut combination;

[0109] The compression spring 12 and the hexagonal nut 13 are located in the screw spring mounting hole 203 on the base plate 2 .

[0110] For specific implementation, see Figures 17a to 17c , Fig.18 A screw countersunk hole 501 is vertically provided through the center of each oblique pressure block 5;

[0111] Each oblique pressure block 5 is provided with an oblique pressure surface 502 on both sides of the front and rear;

[0112] Each inclined pressing block 5 is provided with inclined lifting surfaces 503 on both sides.

[0113] The top surface of each inclined pressure block 5 is an inclined pressure block upper end surface 504;

[0114] In a specific implementation, the cover plate 7 is mounted on the base plate 2 by four countersunk screws 14. That is, the cover plate 7 is arranged on the top of the base plate 2;

[0115] Further, see Fig.21a , Figure 21b and Fig. 22 As shown, a cover plate center hole 701 is vertically provided at the center position of the cover plate 7;

[0116] The cover plate 7 has four cover plate mounting holes 702 evenly distributed around the outside of the cover plate center hole 701;

[0117] Four cover plate mounting holes 702 are arranged corresponding to the four cover plate mounting holes 202 on the bottom plate 2;

[0118] After the countersunk screw 14 passes through the cover plate mounting hole 702 of the cover plate 7, it is threadedly fixedly connected with the four cover plate mounting holes 202 (internal thread holes) on the corresponding position of the bottom plate 2. Therefore, the cover plate 7 can be fixed on the bottom plate 2 in a limited position.

[0119] Furthermore, the hexagon socket screw 11 vertically penetrates through the cover plate center hole 701 of the cover plate 7 .

[0120] In specific implementation, the oblique pressing block 5 is used to press down the rod head end surface 105 at the top of the flat rod head 101 of the two pull rod blanks 1-0 located on the front and rear sides thereof under the action of the compression spring 12 of the oblique pressing block group 10;

[0121] The two tie rod blanks 1 - 0 located at the front and rear sides of the oblique pressure block 5 are symmetrically distributed front to back.

[0122] In the present invention, for specific implementation, see Fig.19a , Fig.19b , Fig. 20 A U-shaped opening 601 is provided in the transverse middle of the pressing plate 6 at a position corresponding to the stud bolt 9;

[0123] The left and right ends of the bottom of the pressure plate 6 are respectively provided with pressure-bearing arc surfaces 602;

[0124] The pressure-bearing arc surface 602 of the pressure plate 6 abuts against (ie, is in close contact with) the upper plane surface 504 of the inclined pressure block 5 in the inclined pressure block group 10;

[0125] In the present invention, for specific implementation, see Figures 13a to 13c , Fig.14 The positioning pad 3 is provided with two positioning pad mounting holes 301 at positions corresponding to the two positioning pad mounting screw holes 207 on the bottom plate 2;

[0126] The positioning pad 3 is connected to the base plate 2 by means of a fastening screw; after the fastening screw passes through the positioning pad mounting pin hole 302 from top to bottom, it is threadedly fixedly connected with the positioning pad mounting screw hole 207 corresponding to the position;

[0127] The positioning pad 3 is provided with two positioning pad mounting pin holes 302 at positions corresponding to the two pin holes 208 on the bottom plate 2;

[0128] The positioning pad 3 is connected to the base plate 2 via a positioning pin; both ends of the positioning pin are located in the pin hole 208 and the positioning pad installation pin hole 302;

[0129] In specific implementation, the upper end surface of the positioning pad 3 facing the stud bolt 9 is the end positioning surface 304;

[0130] On the end positioning surface 304, two side positioning platforms 303 are protruding upward and symmetrically distributed;

[0131] The left and right end surfaces of each side positioning platform 303 are side positioning surfaces 305;

[0132] The positioning pad 3 is vertically provided with a knife outlet hole 306 on the left and right sides of each side positioning platform 303;

[0133] See also Fig.13a As shown, the distance between the center position of the knife hole 306 and the lower part of the side opposite to the positioning pad 3 is Y;

[0134] The distance between the center position of the knife hole 306 and the side positioning surface 305 of the adjacent side positioning platform 303 is X;

[0135] Y is equal to the distance between the center point of the bearing mounting hole 102 on the finished tie rod 1 and the lower end surface 104 of the threaded rod on the finished tie rod 1;

[0136] X is equal to the distance between the center point of the bearing mounting hole 102 on the finished pull rod 1 and the rod head side surface 106 on one side of the flat rod head 101 on the finished pull rod 1.

[0137] In a specific implementation, the aperture size of the knife hole 306 is larger than the aperture size of the bearing mounting hole 102 (for example, 1 mm larger);

[0138] In specific implementation, the positioning pad 3 is located between the inclined pressure block 5 and the positioning bar 4 of the inclined pressure block group 10;

[0139] The side positioning surface 305 of each side positioning platform 303 of the positioning pad 3 contacts the rod head side surface 106 of the flat rod head 101 of the pull rod blank 1-0 placed on the end positioning surface 304 at the top of the positioning pad 3;

[0140] The threaded rod 103 of the tie rod blank 1-0 has a threaded rod lower end surface 104 that contacts the large end positioning surface 403 of the adjacent positioning strip 4;

[0141] In the present invention, for specific implementation, see Fig.15a , Fig.15b and Fig.16 , each positioning bar 4 is provided with four positioning bar mounting holes 401 with bottom openings;

[0142] Four small bosses 402 are respectively protrudingly provided on the upper part of the opposite side of the two positioning strips 4;

[0143] The end surfaces of the two positioning strips 4 on one side opposite to each other are large positioning surfaces 403 .

[0144] In the present invention, in a specific implementation, two stud bolts 9 are installed on the transversely distributed central axis 209 of the bottom plate 2;

[0145] Two stud bolts 9 are located in the longitudinal middle of the bottom 2 .

[0146] In the present invention, in a specific implementation, the bottom surface of the shoulder nut 8 abuts against (ie, is in tight contact with) the top surface of the pressure plate 6 ; therefore, the pressure plate 6 can be locked by the shoulder nut 8 .

[0147] In the present invention, in a specific implementation, the two positioning pads 3 are symmetrically distributed front to back with the transversely distributed central axis 209 of the base plate 2 as the symmetry axis.

[0148] Based on the processing and positioning device for the bearing mounting hole on the pull rod provided by the present invention, the present invention also provides a processing system for the bearing mounting hole on the pull rod, which includes the processing and positioning device for the bearing mounting hole on the pull rod as described above, and a milling machine processing center;

[0149] The milling machine processing center is used to process the bearing mounting hole of each tie rod blank 1-0 through the milling cutter (such as a three-face milling cutter) thereon to obtain a finished tie rod 1.

[0150] In the present invention, in specific implementation, the milling machine processing center is a mechanical processing equipment with mature prior art, which will not be described in detail here.

[0151] For example, you can use the VL1165 vertical machining center (milling machine machining center) produced by Dongguan Jugao Machine Tool Co., Ltd., manually operate the machine coordinate axis to make the tool close to the workpiece to be processed (such as the tie rod blank 1-0), and use the trial cutting method to set the tool, that is, gently cut the workpiece surface to determine the relative position of the tool and the workpiece, record the value in the machine coordinate system at this time, as the origin of the workpiece coordinate system, complete the tool setting, and then, through the input device of the CNC system of the vertical machining center (such as keyboard, U disk, etc.), input the existing workpiece processing program into the machine tool; finally, switch the working mode of the machine tool to the automatic operation mode, press the start button, and the machine tool will automatically process according to the trajectory and parameters set by the program to complete the processing operation of the bearing mounting hole on the workpiece. The above workpiece processing operation adopts the existing mature technology, which is the existing conventional processing means, has been applied in actual production, and will not be repeated here.

[0152] It should be noted that the processing positioning device of the present invention is a clamping and positioning device for the tie rod blank, which can conveniently and reliably position multiple tie rod blanks to be processed, ensuring the reliability of positioning. After clamping and positioning using the device of the present invention, based on the mature and widely used processing means (i.e., existing technical means) of the prior art, the bearing mounting hole processing operation is continued for multiple (e.g., eight) workpieces to be processed (i.e., tie rod blanks), which is conducive to ensuring the processing efficiency.

[0153] In order to more clearly understand the technical solution of the present invention, the working process of the present invention is described below.

[0154] First, fix the device of the present invention on the workbench, loosen the shoulder nut 8, remove the pressure plate 6, and the staff holds the lifting surface 503 of the inclined pressure block 5 with one hand to lift the inclined pressure block 5 upwards. With the other hand, the lower end faces 104 of the threaded rods of the two workpieces to be processed (i.e., the pull rod blanks 1-0) are placed close to the large end positioning surface 403 of the positioning strip 4 and placed on the side positioning platform 303 of the positioning pad 3 between the inclined pressure block 5 and the positioning strip 4. Adjust the left and right positions of the pull rod blank 1-0 so that the side face 106 of the rod head on one side of the pull rod blank 1-0 is in close contact with the side positioning surface 305 of the side positioning platform 303 of the positioning pad 3; at this time, the rod head end face 105 on one side (i.e., the lower side) of the flat rod head 101 is located on the end positioning surface 304 at the top of the positioning pad 3.

[0155] Then, lower the inclined pressure block 5, and the two placed workpieces to be processed (i.e., the pull rod blanks 1-0) will be pre-pressed on the device under the action of the compression spring 12 of the inclined pressure block group 10 (i.e., the rod head end face 105 on the lower side of the flat rod head 101 is in close contact with and abuts against the end positioning face 304 on the top of the positioning pad 3). In the same way, clamp it and the other three groups (two in each group) of workpieces to be processed onto the device of the present invention, and place the pressure plate 6 horizontally from the U-shaped opening 601 onto the stud bolt 9, so that the pressure-bearing arc surface 602 of the pressure plate 6 abuts against the upper plane 504 of the inclined pressure block, and tighten the shoulder nut 8 at the end of the stud bolt 9 above the pressure plate 6, thereby completing the clamping of four groups of eight workpieces to be processed.

[0156] Finally, start the milling machine processing center, select a three-sided milling cutter with a shaft diameter equivalent to the bearing mounting hole to be processed on the milling machine, position the tool at the position of the bearing mounting hole to be processed, and then use the three-sided milling cutter to sequentially perform processing operations on the bearing mounting hole 102 on four groups of eight workpieces to be processed (i.e., tie rod blanks 1-0), thereby finally obtaining a finished tie rod 1 with the bearing mounting hole 102 processed.

[0157] Compared with the prior art, the processing and positioning device for the bearing mounting hole on the pull rod provided by the present invention has the following beneficial effects:

[0158] 1. The present invention adopts an inclined pressing block 5 to pre-tighten the end face of the tie rod blank to be processed (i.e., the end face 105 of the rod head at the top of the flat rod head 101). As shown in FIG9 , the inclined pressing block 5 contacts the tie rod blank 1-0 (specifically, the end face of the flat rod head 101 away from the threaded rod 103) through the inclined pressing surface 504, thereby converting the extrusion force F on the tie rod blank 1-0 toward the adjacent positioning strip 4 formed by the compression spring 12 into a downward pressure F2 and a longitudinal thrust F1 on the workpiece, thereby ensuring the reliability of workpiece positioning in two directions;

[0159] 2. The present invention uses an oblique pressure block group with a compression spring to pre-tighten the workpieces in a group of two to prevent the workpieces from leaving the positioning surface during the clamping process;

[0160] 3. One pressing plate of the present invention can press 4 workpieces at one time, saving time and labor.

[0161] 4. By applying the present invention, a plurality of tie rod blanks can be clamped at one time. The present invention has a reasonable structure, is convenient and quick to load and unload workpieces, and can process 8 workpieces at the same time, thus greatly improving work efficiency.

[0162] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A processing and positioning device for a bearing mounting hole on a pull rod, characterized in that: include: A base plate (2), a positioning pad (3), a positioning strip (4), a pressure plate (6), a shoulder nut (8), a stud bolt (9), and an inclined pressure block assembly (10); Two stud bolts (9) are arranged on the bottom plate (2) and are symmetrically distributed on the left and right sides; A set of oblique pressure block groups (10) are respectively arranged on the left and right sides of each stud bolt (9); The upper portion of each stud bolt (9) vertically penetrates a pressing plate (6); The portion of each stud bolt (9) located above the pressure plate (6) is threadedly connected to a shoulder nut (8); A pressing plate (6) is provided on the top of each set of inclined pressure block groups (10); A pressing plate (6) for pressing the oblique pressing block group (10) downwards; A positioning pad (3) is provided on the top of the bottom plate (2) and on the front and rear sides of each set of inclined pressure block groups (10); A transversely distributed positioning strip (4) is respectively provided at the front and rear ends of the top of the bottom plate (2); The lower parts of the two positioning pads (3) facing away from each other abut against the lower parts of the two positioning strips (4) facing each other; An inclined pressing block group (10) is located between two positioning pads (3) and is used to press adjacent tie rod blanks (1-0); Each positioning pad (3) is used to place the flat rod heads (101) of four tie rod blanks (1-0) and is in contact with a rod head side surface (106) on one side of each flat rod head (101).

2. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 1, characterized in that: The inclined pressing block group (10) is used to press the end of the flat rod head (101) of the adjacent tie rod blank (1-0) away from the threaded rod (103) downward and toward the adjacent positioning strip (4); The positioning strip (4) is used to abut against the threaded rod lower end surface (104) of the threaded rod (103) of the pull rod blank (1-0).

3. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 1, characterized in that: Two stud bolt mounting holes (201) are arranged on the bottom plate (2) and are symmetrically distributed on the left and right sides; A set of cover plate mounting hole assemblies are respectively vertically penetrated on the left and right sides of each stud bolt mounting hole (201); A screw spring mounting hole (203) is vertically provided at the inner center of each set of cover plate mounting hole combinations; The screw spring mounting hole (203) is used to accommodate the compression spring (12) and the hexagonal nut (13) in the inclined pressure block assembly (10).

4. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 3, characterized in that: Each set of cover plate mounting hole combinations includes four cover plate mounting holes (202); The bottom plate (2) is provided with a chip removal hole (204) vertically penetrating the front and rear sides of each set of cover plate mounting hole combination; A chip removal hole (204) is arranged at a position corresponding to the tool outlet hole (306) on the positioning pad (3); and / or, The front and rear ends of the upper end surface of the bottom plate (2) are respectively provided with transversely distributed positioning strip installation grooves (205); Four countersunk screw holes (206) are arranged at equal intervals in the horizontal direction on the positioning bar installation groove (205); Two positioning pad mounting screw holes (207) and two pin holes (208) are vertically penetrated on the bottom plate (2) at a position between the positioning bar mounting groove (205) and the chip removal hole (204); The two positioning pad mounting screw holes (207) are symmetrically distributed on the left and right sides; The two pin holes (208) are symmetrically distributed on the left and right, and the two positioning pad mounting screw holes (207) are located in the middle between the two pin holes (208).

5. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 1, characterized in that: The inclined pressure block assembly (10) comprises an inclined pressure block (5), a cover plate (7), a hexagon socket screw (11), a compression spring (12) and a hexagon nut (13); An oblique pressure block (5) is provided on the top of the vertically distributed hexagon socket screw (11); A horizontally distributed cover plate (7) is provided on the upper part of the hexagon socket screw (11) below the oblique pressure block (5); The lower end of the hexagon socket screw (11) is threadedly connected with a hexagonal nut assembly; A compression spring (12) is provided on the outer side of the hexagon socket screw (11) between the cover plate (7) and the hexagon nut assembly; The compression spring (12) and the hexagonal nut (13) are located in the screw spring mounting hole (203) on the base plate (2).

6. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 5, characterized in that: A screw countersunk hole (501) is vertically provided through the center of each oblique pressure block (5); Each oblique pressure block (5) is provided with oblique pressure surfaces (502) on both sides of the front and rear; Each oblique pressure block (5) is provided with inclined lifting surfaces (503) on the left and right sides. The top surface of each inclined pressure block (5) is an inclined pressure block upper end surface (504); and / or, The cover plate (7) is mounted on the base plate (2) by means of four countersunk screws (14); A cover plate center hole (701) is vertically penetrated at the center of the cover plate (7); The cover plate (7) is provided with four cover plate mounting holes (702) evenly distributed around the outer sides of the cover plate center hole (701); Four cover plate mounting holes (702) are arranged corresponding to the four cover plate mounting holes (202) on the bottom plate (2); After the countersunk screw (14) passes through the cover plate mounting hole (702) of the cover plate (7), it is threadedly fixedly connected with four cover plate mounting holes (202) on the base plate (2) at corresponding positions.

7. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 1, characterized in that: A U-shaped opening (601) is provided in the transverse middle of the pressing plate (6) at a position corresponding to the stud bolt (9); The left and right ends of the bottom of the pressure plate (6) are respectively provided with pressure-bearing arc surfaces (602); The pressure-bearing arc surface (602) of the pressure plate (6) abuts against the inclined pressure block upper plane (504) of the inclined pressure block (5) in the inclined pressure block group (10).

8. The processing and positioning device for the bearing mounting hole on the pull rod according to claim 1, characterized in that: The end of the upper end surface of the positioning pad (3) facing the stud bolt (9) is an end positioning surface (304); On the end positioning surface (304), two side positioning platforms (303) are arranged to protrude upward and are symmetrically distributed on the left and right sides; The left and right end surfaces of each side positioning platform (303) are side positioning surfaces (305); The positioning pad (3) is vertically provided with a knife outlet hole (306) on the left and right sides of each side positioning platform (303); The distance between the center position of the knife exit hole (306) and the lower part of the side opposite to the positioning pad (3) is Y; The distance between the center position of the knife exit hole (306) and the side positioning surface (305) of the adjacent side positioning platform (303) is X; Y is equal to the distance between the center point of the bearing mounting hole (102) on the finished pull rod (1) and the lower end surface (104) of the threaded rod on the finished pull rod (1); X is equal to the distance between the center point of the bearing mounting hole (102) on the finished pull rod (1) and the rod head side surface (106) on one side of the flat rod head (101) on the finished pull rod (1); The diameter of the knife exit hole (306) is larger than the diameter of the bearing mounting hole (102); The side positioning surface (305) of each side positioning platform (303) of the positioning pad (3) contacts the rod head side surface (106) on one side of the flat rod head (101) of the pull rod blank (1-0) placed on the end positioning surface (304) at the top of the positioning pad (3); The threaded rod (103) of the pull rod blank (1-0) has a threaded rod lower end surface (104) which contacts the large end positioning surface (403) of the adjacent positioning strip (4); and / or, The positioning pad (3) is provided with two positioning pad mounting holes (301) at positions corresponding to the two positioning pad mounting screw holes (207) on the bottom plate (2); The positioning pad (3) is connected to the base plate (2) by means of a fastening screw; after the fastening screw passes through the positioning pad mounting pin hole (302) from top to bottom, it is threadedly fixedly connected with the positioning pad mounting screw hole (207) at the corresponding position; The positioning pad (3) is provided with two positioning pad mounting pin holes (302) at positions corresponding to the two pin holes (208) on the bottom plate (2); The positioning pad (3) is connected to the base plate (2) via a positioning pin; two ends of the positioning pin are located in the pin hole (208) and the positioning pad installation pin hole (302).

9. The machining and positioning device for the bearing mounting hole on the pull rod according to any one of claims 1 to 8, characterized in that: Each positioning bar (4) is provided with four positioning bar mounting holes (401) with bottom openings; Four small bosses (402) are respectively protrudingly provided on the upper parts of the two positioning strips (4) on opposite sides; The end surfaces on one side opposite to the two positioning strips (4) are large positioning surfaces (403).

10. A system for processing bearing mounting holes on a tie rod, characterized in that: A processing and positioning device for a bearing mounting hole on a pull rod as claimed in any one of claims 1 to 9, and a milling machine tool processing center; The milling machine processing center is used to process the bearing mounting hole of each tie rod blank (1-0) through the milling cutter thereon to obtain a finished tie rod (1).

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