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

Abstract

The utility model 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 pull rod blanks to be machined can be conveniently and reliably positioned, the positioning reliability is ensured, further machining operation of bearing mounting holes is facilitated, and the machining efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical processing technical field especially is a kind of processing positioning device and processing system of bearing mounting hole on pull rod. BACKGROUND

[0002] Referring to Figures la to Id And Figure 2 , pull rod 1 is the switching machine in the field of rail transit technology, which is a connecting rod composition (i.e. connecting rod device), and the upper part is provided with a flat-shaped rod head 101, the center of the flat-shaped rod head 101 is provided with a bearing mounting hole 102, and the inner side of the bearing mounting hole 102 is used to install a joint bearing 15. In the indicating rod connecting composition, the pull rod 1 is hinged to the indicating rod joint 17 located on the upper part of the indicating rod connecting composition by the bolt pin 16 passing through the inner side of the joint bearing 15.

[0003] The lower part of the pull rod 1 is provided with a threaded rod 103, and the threaded rod 103 is provided with a threaded rod lower end surface 104 on the side away from the flat-shaped rod head 101. In the indicating rod connecting composition, the lower end is threadedly connected to the 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 composition, 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 can be rotated around the bearing mounting hole 102 center of the connecting rod 1 through the bolt pin 16 and the joint bearing 15.

[0004] Referring to Figure 3 , in order to process the bearing mounting hole 102 on the pull rod blank 1-0 (the pull rod blank 1-0 is basically the same as the finished pull rod 1, the difference is that there is no bearing mounting hole 102, and the others are the same), to obtain the finished pull rod 1, the processing technology requires that the rod head end surface 105 on one side (i.e. single side) of the flat-shaped rod head 101, the rod head side surface 106 on one side (i.e. single side) and the threaded rod lower end surface 104 are positioned, and then the bearing mounting hole 102 is processed.

[0005] However, due to the small size of the shape of the pull rod blank, it is currently urgent to develop a device that can clamp multiple pull rod blanks at the same time and perform processing positioning operation on multiple pull rod blanks, thereby further improving the processing efficiency of the workpiece. INVENTION CONTENTS

[0006] The utility model aims at the technical defects existing in prior art, and provides a processing positioning device and processing system for bearing mounting hole on pull rod.

[0007] Therefore, the utility model provides a processing positioning device for bearing mounting hole on pull rod, which comprises a base plate, a positioning pad, a positioning strip, a pressing plate, a shoulder nut, a double-headed bolt and an inclined pressing block group.

[0008] Two double-headed bolts are symmetrically arranged on the bottom plate;

[0009] A set of inclined pressing blocks is arranged on the left and right sides of each double-headed bolt;

[0010] A pressing plate vertically penetrates the upper part of each double-headed bolt;

[0011] The part above the pressing plate of each double-headed bolt is threadedly connected with a shoulder nut;

[0012] The top of each set of inclined pressing blocks is provided with a pressing plate;

[0013] The pressing plate is used for pressing the inclined pressing blocks downward;

[0014] The top of the bottom plate is provided with a positioning pad on the front and rear sides of each set of inclined pressing blocks;

[0015] The top of the bottom plate is provided with a transversely arranged positioning strip at the front and rear ends;

[0016] The lower part of the side, opposite to the two positioning pads, is in abutment with the lower part of the side, opposite to the two positioning strips;

[0017] The inclined pressing blocks are located between the two positioning pads and are used for pressing the adjacent pull rod blank;

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

[0019] In addition, the utility model also provides a processing system of the bearing mounting hole of the pull rod, which comprises the processing positioning device of the bearing mounting hole of the pull rod and a milling machine tool machining center.

[0020] The milling machine tool machining center is used for processing the bearing mounting hole of each pull rod blank through the milling cutter thereon to obtain the finished pull rod.

[0021] According to the technical scheme provided by the utility model, compared with the prior art, the utility model provides a processing positioning device and processing system of the bearing mounting hole of the pull rod, which has a scientific structure design, can conveniently and reliably position a plurality of pull rod blanks to be processed, guarantees the reliability of the positioning, and is favorable for further processing the bearing mounting hole of a plurality of workpieces (i.e., the pull rod blanks) to be processed, guarantees the processing efficiency, and has great practical significance. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure la 、 Figure lb They are respectively the plan view and the side view of the finished pull rod.

[0023] Figure lc , Figure Id These are schematic diagrams one and two, respectively, illustrating the connection relationship between the tie rod and the indicator rod joint in the connecting rod assembly.

[0024] Figure 2 : A three-dimensional view of the completed tie rod;

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

[0026] Figures 4a to 4c These are, respectively, a top view, a front view, and a side view of a machining and positioning device for bearing mounting holes on a tie rod provided by this utility model, when the tie rod blank is not clamped;

[0027] Figure 5 This utility model provides a machining and positioning device for bearing mounting holes on a tie rod, with a three-dimensional view of the tie rod blank before clamping.

[0028] Figure 6 This utility model provides a machining and positioning device for bearing mounting holes on a tie rod, with a three-dimensional view of the tie rod blank already clamped.

[0029] Figure 7 A three-dimensional view of a workpiece after it has been processed using the device of this invention;

[0030] Figures 8a to 8c These are, respectively, a top view, a front view, and a side view of the device of this utility model with the processed workpiece (i.e., the finished tie rod) installed on the left half, and the right half after the pressure plate and the inclined pressure block have been removed.

[0031] Figure 9 : Force decomposition diagram of the inclined pressure block under working conditions;

[0032] Figure 10 : A three-dimensional view of the inclined pressure block assembly;

[0033] Figure 11a Top view of the base plate;

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

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

[0036] Figure 13a Top view of the positioning pad located at the rear end;

[0037] Figure 13b Along Figure 13athe section view along the line B-B shown in the figure;

[0038] Figure 13c : the front view of the positioning pad located at the rear end;

[0039] Figure 14 : the perspective three-dimensional view of the positioning pad located at the rear end;

[0040] Figure 15a : the front partial section view of the positioning strip located at the rear end;

[0041] Figure 15b : the bottom view of the positioning strip located at the rear end, i.e. the C-direction view;

[0042] Figure 15c : the side view of the positioning strip located at the rear end;

[0043] Figure 16 : the perspective three-dimensional view of the positioning strip located at the rear end

[0044] Figures 17a to 17c : the plan view, the side view and the section view of the inclined pressing block respectively;

[0045] Figure 18 : the perspective three-dimensional view of the inclined pressing block;

[0046] Figures 19a to 19b : the plan view and the front view of the pressing plate respectively;

[0047] Figure 20 : the perspective three-dimensional view of the pressing plate;

[0048] Figure 21a : the plan view of the cover plate;

[0049] Figure 21b : the section view along the line D-D shown in the figure; Figure 21a

[0050] : the perspective three-dimensional view of the cover plate; Figure 22

[0051] : the perspective three-dimensional view of the shoulder nut; Figure 23

[0052] : the front view of the stud bolt; Figure 24

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

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

[0055] 2, the bottom plate;

[0056] ​201, double-end bolt mounting hole; 202, first cover plate mounting hole; 203, screw spring mounting hole; 204, chip removal hole; 205, positioning strip mounting groove;

[0057] 206, countersunk screw hole; 207, positioning pad mounting screw hole; 208, pin hole; 209, central 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, tool outlet hole;

[0060] 4, positioning strip;

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

[0062] 5, inclined pressing block;

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

[0064] 6, pressing plate;

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

[0066] 7, cover plate;

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

[0068] 8, shoulder nut; 9, double-end bolt; 10, inclined pressing block group;

[0069] 11, inner hexagonal screw; 12, compression spring; 13, hexagonal nut; 14, countersunk screw. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0071] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0072] In the description of the utility model, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relationship shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0073] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise explicitly specified.

[0074] Referring to Figures la to Id , Figures 2 to 3 , Figures 4a to 4c , Figures 5 to 7 , Figures 8a to 8c , Figures 9 to 10 , Figures 11a to 11b , Figure 12 , Figures 13a to 13c , Figure 14 , Figures 15a to 15c , Figure 16 , Figures 17a to 17b , Figure 18 , Figures 19a to 19b , Figure 20 , Figures 21a to 21b , Figures 22 to 24 The utility model provides a kind of processing positioning device of bearing mounting hole on pull rod, it include: bottom plate 2, positioning pad 3, positioning strip 4, pressing plate 6, shoulder nut 8 and stud bolt 9 and inclined pressing block group 10;

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

[0076] The left and right sides of each stud bolt 9 are respectively provided with a set of inclined pressing block group 10;

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

[0078] The part of each stud bolt 9 above the pressing plate 6 is threadedly connected with a shoulder nut 8;

[0079] The top of each set of inclined pressing block group 10 is provided with a pressing plate 6;

[0080] The pressing plate 6 is used to press the inclined pressing block group 10 (specifically the inclined pressing block 5 in the inclined pressing block group 10) downward;

[0081] The top of the bottom plate 2 is respectively provided with a positioning pad 3 on the front and rear sides of each set of inclined pressing block group 10;

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

[0083] The lower part of the side of the two positioning pads 3 opposite to each other is in abutment with the lower part of the side of the two positioning strips 4 opposite to each other.

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

[0085] In the utility model, each positioning pad 3 is used to place four flat rod heads 101 of the pull rod blank 1-0 and is in contact with the rod head side surface 106 on one side of each flat rod head 101 (specifically the side positioning surface 305 of each side positioning table 303 of the positioning pad 3);

[0086] The inclined pressing block group 10 (specifically the inclined pressing surface 502 of the inclined pressing block 5 in the inclined pressing block group 10) is used to press the end of the flat rod head 101 of the adjacent pull rod blank 1-0 away from the threaded rod 103 downward and towards 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 (top abutting contact) the threaded rod lower end surface 104 of the threaded rod 103 of the pull rod blank 1-0;

[0088] In the utility model, it needs to be explained that the utility model adopts the inclined pressing block 5 to pre-press the end surface of the pull rod blank to be processed (namely the rod head end surface 105 on the top of the flat rod head 101), the inclined pressing block 5 contacts the pull rod blank 1-0 (specifically the joint of the end surface on the side away from the threaded rod 103 and the rod head end surface 105 of the flat rod head 101) through the inclined pressing surface 502, thereby converting the extrusion force F of the pull rod blank 1-0 towards the adjacent positioning strip 4 under the action of the compression spring 12 into the downward pressure F2 and the longitudinal thrust F1 to the workpiece, which guarantees the reliability of the workpiece positioning in two directions.

[0089] In the utility model, referring to Figure 11a 、 Figure 11b and Figure 12 , two double-headed bolt mounting holes 201 distributed left-right symmetrically are arranged on bottom plate 2;

[0090] The left and right sides of each double-headed bolt mounting hole 201 are vertically provided with a set of cover plate mounting hole combination respectively;

[0091] The inner side center position of each set of cover plate mounting hole combination is vertically provided with a screw spring mounting hole 203;

[0092] Screw spring mounting hole 203 is used for accommodating compression spring 12 and hexagon nut 13 in inclined pressing block group 10;

[0093] Specifically, each set of cover plate mounting hole combination comprises four first cover plate mounting holes 202;

[0094] Further, the centers of four first cover plate mounting holes 202 are sequentially connected to form a square shape.

[0095] Specifically, bottom plate 2 is vertically provided with a chip removal hole 204 on the front and rear sides of each set of cover plate mounting hole combination respectively;

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

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

[0098] The aperture size of chip removal hole 204 is same as that of tool outlet hole 306, and is larger than that of bearing mounting hole 102 (for example, 1mm larger), so that bottom plate 2 and positioning pad 3 are not damaged;

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

[0100] Four countersunk screw holes 206 are horizontally and equidistantly arranged on positioning strip mounting groove 205;

[0101] Further, two positioning pad mounting screw holes 207 and two pin holes 208 are vertically arranged between positioning strip mounting groove 205 and chip removal hole 204 of bottom plate 2;

[0102] Two positioning pad mounting screw holes 207 are distributed left-right symmetrically;

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

[0104] In the utility model, referring to Figure 10 , the inclined pressing block group 10 comprises an inclined pressing block 5, a cover plate 7, an internal hexagonal screw 11, a compression spring 12 and a hexagonal nut 13.

[0105] The top of the vertically distributed internal hexagonal screw 11 is provided with the inclined pressing block 5.

[0106] The upper part of the internal hexagonal screw 11 is provided with the horizontally distributed cover plate 7 below the inclined pressing block 5.

[0107] The lower end of the internal hexagonal screw 11 is threadedly connected with a hexagonal nut combination (the hexagonal nut combination comprises a plurality of hexagonal nuts 13, for example, two).

[0108] The compression spring 12 is arranged on the circumferential outer side of the internal hexagonal screw 11 between the cover plate 7 and the hexagonal nut combination.

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

[0110] Specifically, referring to Figures 17a to 17c , Figure 18 A screw countersunk hole 501 is vertically and penetratively arranged at the center of each inclined pressing block 5.

[0111] Inclined pressing surfaces 502 are arranged on the front and back sides of each inclined pressing block 5.

[0112] Inclined pulling surfaces 503 are arranged on the left and right sides of each inclined pressing block 5,

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

[0114] Specifically, the cover plate 7 is installed on the bottom plate 2 through four countersunk head screws 14. That is, the cover plate 7 is arranged on the top of the bottom plate 2.

[0115] Further, referring to Figure 21a , Figure 21b and Figure 22 , a cover plate center hole 701 is vertically and penetratively arranged at the center position of the cover plate 7.

[0116] The cover plate 7 is uniformly provided with four second cover plate mounting holes 702 on the outer side of the cover plate center hole 701.

[0117] The four second cover plate mounting holes 702 are correspondingly arranged with the four first cover plate mounting holes 202 on the bottom plate 2.

[0118] The countersunk screw 14 is fixedly connected with the four first cover plate mounting holes 202 (which are internally threaded holes) on the bottom plate 2 in position after penetrating through the second cover plate mounting hole 702 of the cover plate 7. Therefore, the cover plate 7 can be fixedly positioned on the bottom plate 2.

[0119] Further, the inner hexagonal screw 11 vertically penetrates through the cover plate center hole 701 of the cover plate 7.

[0120] In a specific implementation, the inclined pressing block 5 is used to press the rod head end face 105 at the top of the flat rod head 101 of the two pull rod blank pieces 1-0 located on the front and rear sides of the inclined pressing block group 10 under the action of the compression spring 12 of the inclined pressing block group 10.

[0121] The two pull rod blank pieces 1-0 located on the front and rear sides of the inclined pressing block 5 are symmetrically distributed in front and back.

[0122] In the utility model, in a specific implementation, referring to Figure 19a 、 Figure 19b 、 Figure 20 , the transverse middle part of the pressing plate 6 is provided with a U-shaped opening 601 at a position corresponding to the stud bolt 9;

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

[0124] The pressure-bearing camber surface 602 of the pressing plate 6 is in abutment (i.e. in abutting contact) with the inclined pressing block upper end face 504 of the inclined pressing block 5 in the inclined pressing block group 10;

[0125] In the utility model, in a specific implementation, referring to Figures 13a to 13c 、 Figure 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 with the bottom plate 2 through a fastening screw; the fastening screw penetrates through the positioning pad mounting pin hole 302 from top to bottom and is fixedly connected with the positioning pad mounting screw hole 207 in position through screwing;

[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 with the bottom plate 2 through a positioning pin; the two ends of the positioning pin are located in the pin hole 208 and the positioning pad mounting pin hole 302;

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

[0130] Two left and right symmetrically distributed side positioning platforms 303 are upwardly and protrudingly arranged on the end positioning face 304.

[0131] Each side positioning platform 303 has left and right side end faces as side positioning faces 305;

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

[0133] Referring to Figure 13a , the distance between the center of the cutting hole 306 and the lower part of the side opposite to the positioning pad 3 is Y;

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

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

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

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

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

[0139] The side positioning face 305 of each side positioning platform 303 of the positioning pad 3 is in contact with the rod head side face 106 on one side of the flat rod head 101 of the pull rod blank 1-0 placed on the end positioning face 304 of the top of the positioning pad 3;

[0140] The threaded rod lower end face 104 of the threaded rod 103 of the pull rod blank 1-0 is in contact with the large end positioning face 403 of the adjacent positioning strip 4;

[0141] In the utility model, in a specific implementation, referring to Figure 15a , Figure 15b and Figure 16 , each positioning strip 4 is provided with four positioning strip mounting holes 401 with open bottoms;

[0142] The upper parts of the opposite sides of the two positioning strips 4 are respectively provided with four small bosses 402 protruding;

[0143] The opposite end faces of the two positioning strips 4 are large positioning faces 403.

[0144] In the utility model, in a specific implementation, the bottom plate 2 is provided with two double-headed bolts 9 installed on the transversely distributed central axes 209.

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

[0146] In the utility model, the bottom surface of the shoulder nut 8 abuts against (i.e. abuts tightly against) the top surface of the pressing plate 6; therefore, the pressing plate 6 can be locked by the shoulder nut 8.

[0147] In the utility model, the two positioning pads 3 are symmetrically distributed in front of and behind the bottom plate 2 with the transversely distributed central axis 209 of the bottom plate 2 as the axis of symmetry.

[0148] Based on the machining positioning device for the bearing mounting hole of the pull rod provided in the utility model, the utility model further provides a machining system for the bearing mounting hole of the pull rod, which comprises the machining positioning device for the bearing mounting hole of the pull rod as described above and a milling machine tool machining center.

[0149] The milling machine tool machining center is used for performing the machining operation of the bearing mounting hole on each pull rod blank 1-0 by the milling cutter (for example, a three-flank milling cutter) thereon, so as to obtain the finished product of the pull rod 1.

[0150] In the utility model, the milling machine tool machining center is a mature mechanical machining equipment in the prior art, and will not be described herein.

[0151] For example, the VL1165 type vertical machining center (milling machine tool machining center) produced by Dongguan Juhao Machine Tool Co., Ltd. can be used, the tool is made close to the workpiece (for example, the pull rod blank 1-0) to be machined by manually operating the machine tool coordinate axis, the tool can be sharpened by using the trial cutting method, that is, the workpiece surface is slightly cut to determine the relative position of the tool and the workpiece, the value in the machine tool coordinate system at this time is recorded as the origin of the workpiece coordinate system, the tool is sharpened, then the existing workpiece machining program is input into the machine tool through the input device (such as a keyboard, a U disk, etc.) of the numerical control system matched with the vertical machining center; finally, the working mode of the machine tool is switched to the automatic operation mode, the start button is pressed, and the machine tool will automatically process according to the trajectory and parameters set by the program, so as to complete the machining operation of the bearing mounting hole on the workpiece. The machining operation of the workpiece described above adopts the existing mature technology, is the existing conventional machining means, and has been applied in actual production, and will not be described herein.

[0152] It should be noted that the processing positioning device of the utility model is a clamping positioning device for the pull rod blank, which can conveniently and reliably position a plurality of pull rod blanks to be processed, and ensure the reliability of the positioning. After clamping and positioning by the device of the utility model, the machining means of the prior art which has been maturely applied and popularized (i.e. the existing technical means) is used to continue the machining operation of the bearing mounting hole of the plurality of (e.g. eight) workpieces to be processed (i.e. the pull rod blanks), which is beneficial to ensuring the efficiency of the machining.

[0153] In order to more clearly understand the technical scheme of the utility model, the working process of the utility model is described below.

[0154] Firstly, the device of the utility model is fixed on the workbench, the shoulder nut 8 is loosened, the pressing plate 6 is removed, one hand of the worker holds the lifting surface 503 of the inclined pressing block 5, the inclined pressing block 5 is pulled upward, the other hand positions the lower end surface 104 of the threaded rod of the two workpieces to be processed (i.e. the pull rod blanks 1-0) against the large end positioning surface 403 of the positioning strip 4, and places the workpieces to be processed between the inclined pressing block 5 and the positioning strip 4 on the side positioning table 303 of the positioning pad 3, adjusts the left and right positions of the pull rod blanks 1-0, and makes the one-side rod head side surface 106 of the pull rod blank 1-0 closely adhere to the side positioning surface 305 of the side positioning table 303 of the positioning pad 3; at this time, the rod head end surface 105 of 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, the inclined pressing block 5 is placed down, the two workpieces to be processed (i.e. the pull rod blanks 1-0) placed are pre-pressed on the device under the action of the compression spring 12 of the inclined pressing block group 10 (i.e. so that the rod head end surface 105 of the lower side of the flat rod head 101 closely contacts and abuts against the end positioning surface 304 at the top of the positioning pad 3), and the same method is used to clamp the other three groups (two in each group) of workpieces to be processed on the device of the utility model, the pressing plate 6 is placed horizontally on the double-headed bolt 9 from the U-shaped opening 601, the pressure- bearing arc surface 602 of the pressing plate 6 abuts against the upper end surface 504 of the inclined pressing block, the shoulder nut 8 at the end of the double-headed bolt 9 above the pressing plate 6 is tightened, and the clamping of the four groups of a total of eight workpieces to be processed is completed.

[0156] Finally, the milling machine center is started, a three-flank milling cutter with an axis diameter corresponding to the bearing mounting hole to be processed on the milling machine is selected, the cutter is positioned at the position of the bearing mounting hole to be processed, and the three-flank milling cutter is used to sequentially process the bearing mounting holes 102 of the four groups of a total of eight workpieces to be processed (i.e. the pull rod blanks 1-0), so that the finished pull rod 1 with the completed bearing mounting hole 102 is finally obtained.

[0157] Compared with the prior art, the machining positioning device of the bearing mounting hole on the pull rod has the following beneficial effects:

[0158] 1、 the utility model discloses a pre -pressing from the end surface (i.e. the flat rod head 101 top rod head end surface 105) of the pull rod blank piece of inclined pressure block 5, see 9 shows, and the inclined pressure block 5 is contacted pull rod blank piece 1-0 (specifically the end surface of flat rod head 101 far from the threaded rod 103 one side) through inclined pressure surface 502, thereby the extrusion force F of pull rod blank piece 1-0 to the direction of adjacent positioning strip 4 under the action of compression spring 12 is converted into downward pressure F2 and longitudinal thrust F1 to workpiece, and the reliability of workpiece positioning is guaranteed in two directions;

[0159] 2、 the utility model discloses the pre -pressing of two groups of workpieces of inclined pressure block group with compression spring, prevents workpiece from separating from the positioning surface in the clamping process;

[0160] 3、 the utility model discloses a pressing plate can press 4 workpieces at a time, and time and labor are saved.

[0161] 4、 through the application of the utility model, can clamp multiple pull rod blank pieces at a time, the utility model discloses reasonable structure, and workpiece is convenient and fast to assemble and disassemble, can process 8 workpieces simultaneously, and work efficiency is greatly improved.

[0162] The above-mentioned is only preferred implementation manner of the utility model, and it should be pointed out that for ordinary skilled person in the art, on the premise of not departing from the principle of the utility model, can make a number of improvements and refinements, and these improvements and refinements also should be regarded as the protection scope of the utility model.

Claims

1. A device for machining and positioning bearing mounting holes in a drawbar, characterized in that, It comprises: a base plate (2), positioning pads (3), positioning strips (4), pressing plates (6), shoulder nuts (8) and stud bolts (9), and inclined pressing block groups (10); Two stud bolts (9) are symmetrically arranged on the base plate (2); Each stud bolt (9) is provided with an inclined pressing block group (10) on each side; The upper part of each stud bolt (9) vertically penetrates a pressing plate (6); The part above the pressing plate (6) of each stud bolt (9) is threadedly connected with a shoulder nut (8); The top of each set of inclined pressing block groups (10) is provided with a pressing plate (6); The pressing plate (6) is used to press the inclined pressing block group (10) downward; The top of the base plate (2) is provided with a positioning pad (3) on each side of each set of inclined pressing block groups (10); The top of the base plate (2) is provided with a transversely distributed positioning strip (4) at each end; The lower part of the side opposite to the two positioning pads (3) is in contact with the lower part of the side opposite to the two positioning strips (4); The inclined pressing block group (10) is located between the two positioning pads (3) and is used to press the adjacent pull rod blank (1-0); Each positioning pad (3) is used to place the flat rod head (101) of the four pull rod blanks (1-0) and is in contact with the rod head side (106) on one side of each flat rod head (101).

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

3. The apparatus of claim 1 wherein, Two stud bolt mounting holes (201) are symmetrically arranged on the base plate (2); Each stud bolt mounting hole (201) is vertically provided with a set of cover plate mounting hole combination on each side; A screw spring mounting hole (203) is vertically provided at the inner center position of each set of cover plate mounting hole combination; The screw spring mounting hole (203) is used to accommodate the compression spring (12) and the hexagonal nut (13) in the inclined pressing block group (10).

4. The apparatus of claim 3 wherein, Each set of cover plate mounting hole combination comprises four first cover plate mounting holes (202); The base plate (2) is vertically provided with a chip removal hole (204) on each side of each set of cover plate mounting hole combination; The 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 base plate (2) are respectively provided with transversely distributed positioning strip mounting grooves (205); Four counter-sunk screw holes (206) are transversely and equidistantly arranged on the positioning strip mounting groove (205); The base plate (2) is vertically provided with two positioning pad mounting screw holes (207) and two pin holes (208) at a position between the positioning strip mounting groove (205) and the chip removal hole (204). Two positioning pad mounting screw holes (207) are symmetrically distributed left and right; Two pin holes (208) are symmetrically distributed left and right, and two positioning pad mounting screw holes (207) are located in the middle position between the two pin holes (208).

5. The apparatus of claim 1 wherein, The inclined pressure block group (10) comprises an inclined pressure block (5), a cover plate (7), an internal hexagonal screw (11), a compression spring (12) and a hexagonal nut (13); The top of the vertically distributed internal hexagonal screw (11) is provided with the inclined pressure block (5); The upper part of the internal hexagonal screw (11) is provided with the horizontally distributed cover plate (7) below the inclined pressure block (5); The lower end of the internal hexagonal screw (11) is threadedly connected with a hexagonal nut combination; The compression spring (12) is arranged on the circumferential outer side of the internal hexagonal screw (11) between the cover plate (7) and the hexagonal nut combination; The compression spring (12) and the hexagonal nut (13) are located in the screw spring mounting hole (203) on the bottom plate (2).

6. The apparatus of claim 5 wherein, A screw counterbore (501) is vertically and centrally arranged in each inclined pressure block (5); An inclined pressure surface (502) is arranged on the front and back sides of each inclined pressure block (5); An inclined distribution of lifting surfaces (503) is arranged on the left and right sides of each inclined pressure block (5), 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 installed on the bottom plate (2) by four countersunk head screws (14); A cover plate center hole (701) is vertically and centrally arranged in the cover plate (7); Four second cover plate mounting holes (702) are uniformly distributed on the outer side of the cover plate center hole (701) of the cover plate (7); The four second cover plate mounting holes (702) are correspondingly arranged with the four first cover plate mounting holes (202) on the bottom plate (2); After the countersunk head screw (14) passes through the second cover plate mounting hole (702) of the cover plate (7), it is threadedly fixedly connected with the four first cover plate mounting holes (202) on the bottom plate (2) in the corresponding position.

7. The apparatus of claim 1 wherein, A U-shaped opening (601) is arranged in the transverse middle part of the pressing plate (6) corresponding to the double-headed bolt (9); Pressure- bearing arc surfaces (602) are respectively arranged at the left and right ends of the bottom of the pressing plate (6); The pressure- bearing arc surfaces (602) of the pressing plate (6) abut against the inclined pressure block upper end surfaces (504) of the inclined pressure blocks (5) in the inclined pressure block group (10).

8. The apparatus of claim 1 wherein, The end of the upper end surface of the positioning pad (3) facing the double-headed bolt (9) is an end positioning surface (304); Two left and right symmetrically distributed side positioning platforms (303) are upwardly and protrudingly arranged on the end positioning surface (304); The left and right side end surfaces of each side positioning platform (303) are side positioning surfaces (305); One knife outlet hole (306) is vertically arranged on each side of the positioning pad (3) on the left and right sides of each side positioning platform (303); The distance between the center position of the knife outlet 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 outlet 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 hole diameter of the tool outlet hole (306) is larger than the hole diameter of the bearing mounting hole (102); Each side positioning surface (305) of each side positioning platform (303) of the positioning pad (3) is in contact with 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) of the top of the positioning pad (3); The threaded rod lower end surface (104) of the threaded rod (103) of the pull rod blank (1-0) is in contact with the large 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 with the bottom plate (2) through a fastening screw; the fastening screw is screwed and fixedly connected with the positioning pad mounting screw hole (207) corresponding in position after passing through the positioning pad mounting pin hole (302) from top to bottom; 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 with the bottom plate (2) through a positioning pin; the two ends of the positioning pin are located in the pin hole (208) and the positioning pad mounting pin hole (302).

9. The apparatus of any one of claims 1 to 8, wherein, Each positioning strip (4) is provided with four positioning strip mounting holes (401) with open bottoms; The upper part of the opposite side of each positioning strip (4) is protrusively provided with four small bosses (402); The opposite side end surface of each positioning strip (4) is a large positioning surface (403).

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

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