Pull rod machining positioning device and machining system

Abstract

The invention discloses a machining positioning device and a machining system for a pull rod. The device comprises a limiting block. Two positioning pull rods are longitudinally arranged at the lower end of the limiting block in a penetrating manner; the rear end parts of the two positioning pull rods are respectively provided with a centering shaft; the lower end of the double-end bolt is connected with the central position of the limiting block; the upper end of the double-end bolt is connected with the central position of the horizontally distributed pressing plate; the upper part of the centering shaft is arranged in a pull rod through hole in the rear end of a pull rod blank to be machined; the pressing plate is used for downwards pressing a threaded rod arranged at the front end of the pull rod blank; the front side of the upper end face of the limiting block protrudes upwards to form an end face positioning plate. The rear side face of the end face positioning plate is used for abutting against the front end face of the front end of the pull rod blank. The pull rod through hole of the pull rod blank and the front end face of the threaded rod can be conveniently and reliably positioned, so that the machining quality of a semicircular arc surface and a small arc surface on the pull rod is guaranteed, and the machining efficiency of the pull rod is improved.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and in particular to a machining positioning device and machining system for a tie rod. Background Technology

[0002] A vehicle retarder is a motorized tool used to control the speed of a vehicle during its chuting process. It is the main speed control tool for mechanized hump yards and point-to-point or point-to-connection automated hump yards.

[0003] Tie rod 1 is a connecting part of the linkage in the vehicle reducer; see [link / reference]. Figures 2a to 2d As shown, the rear end is provided with a flat rod head 101, the center of the flat rod head 101 is provided with a pull rod through hole 102 that penetrates the end face 105 of the rod head, the front end is provided with a threaded rod 103, and the front end of the threaded rod 103 is provided with a front end face 104; the rear end of the flat rod head 101 has a semi-circular arc surface 106, and the front ends of the flat rod head 101 have small arc surfaces 107 on both sides.

[0004] See also Figures 1a to 1d , Figure 3 As shown, in order to machine the semi-circular arc surface 106 and the small arc surface 107 on the tie rod blank 1-0 to obtain the finished tie rod 1 (the tie rod blank 1-0 and the finished tie rod 1 are basically the same, the only difference is that the overall outer shape of the flat rod head 101 of the tie rod blank 1 is a cuboid shape, without the semi-circular arc surface 106 and the small arc surface 107, and the rest are the same), the current processing technology requires: to use the tie rod through hole 102 and the front end face 104 of the threaded rod 103 of the tie rod blank 1-0 for positioning, and then to machine the complex shape of the side of the rod head 101 (that is, to machine the semi-circular arc surface 106 at the rear end of the flat rod head 101 and the small arc surfaces 107 on the left and right sides of the front end).

[0005] However, there is currently no device that can conveniently and reliably position the tie rod through hole 102 and the front end face 104 of the threaded rod 103 of the tie rod blank 1-0, thereby ensuring the machining quality and efficiency of the semi-circular arc surface 106 and the small arc surface 107 on the tie rod. Summary of the Invention

[0006] The purpose of this invention is to address the technical deficiencies of existing technologies by providing a machining positioning device and machining system for tie rods.

[0007] Therefore, the present invention provides a processing and positioning device for a pull rod, which includes a limiting block;

[0008] At the lower end of the limiting block, two positioning rods are longitudinally connected.

[0009] Each of the two positioning rods has a centering shaft at its rear end;

[0010] The lower end of the double-ended bolt is connected to the center of the limiting block;

[0011] The upper end of the double-ended bolt is connected to the center of the horizontally distributed pressure plates;

[0012] The upper part of the centering shaft is located in the tie rod through hole at the rear end of the tie rod blank to be processed;

[0013] A pressure plate is used to press down on the threaded rod at the front end of the tie rod blank.

[0014] An end face positioning plate is provided on the upper front side of the limit block;

[0015] The rear side of the end face positioning plate is used to abut against the front face of the front end of the tie rod blank.

[0016] In addition, the present invention also provides a tie rod processing system, which includes a tie rod processing positioning device as described above.

[0017] As can be seen from the technical solution provided by the present invention above, compared with the prior art, the present invention provides a machining positioning device and machining system for a tie rod. The design is scientific and can conveniently and reliably position the tie rod through hole and the front end face of the threaded rod of the tie rod blank, thereby ensuring the machining quality of the semi-circular arc surface and small arc surface on the tie rod, improving the machining efficiency of the tie rod, and has significant practical significance. Attached Figure Description

[0018] Figures 1a to 1d These are, respectively, a three-dimensional structural schematic diagram, a top view, a left side view, and a rear view of the tie rod blank to be processed;

[0019] Figures 2a to 2d These are, respectively, a three-dimensional structural schematic diagram, a left top view, a side view, and a rear view of the finished tie rod obtained after processing;

[0020] Figure 3 This is a schematic diagram of the part to be cut on the raw tie rod blank to be processed;

[0021] Figures 4a to 4f These are three-dimensional structural schematic diagrams, front view, top view, left side view, rear view and bottom view of a tie rod processing and positioning device provided by the present invention, wherein an unprocessed tie rod blank is clamped on the left side and a finished tie rod after processing is clamped on the right side;

[0022] Figures 5a to 5d These are, respectively, a three-dimensional structural schematic diagram, a front view, a left side view, and a bottom view of the processing and positioning device for a tie rod provided by the present invention, when the tie rod blank is not clamped;

[0023] Figure 6 The three-dimensional structure schematic diagram of the processing positioning device of the pull rod provided by the present application after the pressing plate is removed;

[0024] Figures 7a to 7d The three-dimensional structure schematic diagram, front view, top view and right side view of the limiting block, respectively;

[0025] Figures 8a to 8e The three-dimensional structure schematic diagram, front view, top view, right side view and bottom view of the positioning pull rod, respectively;

[0026] Figures 9a to 9e The three-dimensional structure schematic diagram, front view, back view, top view and bottom view of the centering shaft, respectively;

[0027] Figure 9f The relationship schematic diagram between the size of the centering shaft and the size of the pull rod through hole;

[0028] Figures 10a to 10c The three-dimensional structure schematic diagram, front view and top view of the pressing plate, respectively;

[0029] Figure 11 The front view of the double-headed bolt;

[0030] Figures 12a to 12b The sectional view and top view of the second nut, respectively;

[0031] In the figure, the pull rod is 1; the pull rod blank is 1-0;

[0032] The flat rod head is 101, the pull rod through hole is 102, the threaded rod is 103, the front end face is 104, the rod head end face is 105, the semicircular arc face is 106, and the small arc face is 107;

[0033] The limiting block is 2; the end face positioning plate is 201, the threaded rod positioning face is 202, the positioning pull rod mounting hole is 203, the double-headed bolt mounting hole is 204, and the anti-rotation face is 205;

[0034] The positioning pull rod is 3; the centering shaft anti-rotation groove is 301, the centering shaft mounting hole is 302, the rod part is 303, the anti-rotation flat is 304, the threaded end is 305, and the rod shoulder is 306;

[0035] The centering shaft is 4; the centering arc face is 401, the clamping flat is 402, and the threaded tightening end is 403; the first arc face is 404;

[0036] The pressing plate is 5; the double-headed bolt hole is 501, and the pressing face is 502; the double-headed bolt is 6;

[0037] The first nut is 71, the second nut is 72; the first compression spring is 81; and the second compression spring is 82. DETAILED DESCRIPTION

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] See Figures 1a to 1d , Figures 2a to 2d , Figure 3 , Figures 4a to 4f , Figures 5a to 5d , Figure 6 , Figures 7a to 7d , Figures 8a to 8e , Figures 9a to 9f , Figures 10a to 10c , Figure 11 as well as Figures 12a to 12b The present invention provides a processing and positioning device for a pull rod, including a limiting block 2, a positioning pull rod 3, a centering shaft 4, a pressure plate 5, a double-ended bolt 6, a first nut 71, a second nut 72, a first compression spring 81 and a second compression spring 82;

[0043] The lower end of the limiting block 2 is longitudinally provided with two positioning pull rods 3;

[0044] The rear end of each of the two positioning pull rods 3 is provided with a centering shaft 4;

[0045] The lower end of the stud bolt 6 is connected to the center of the limiting block 2;

[0046] The upper end of the stud bolt 6 is connected to the center of the horizontally distributed pressing plate 5;

[0047] The upper part of the centering shaft 4 is arranged in the pull rod through hole 102 at the rear end of the pull rod blank 1-0 to be processed;

[0048] The pressing plate 5 is used to press the threaded rod 103 at the front end of the pull rod blank 1-0 downward;

[0049] The front side of the upper end surface of the limiting block 2 is upwardly protrudingly provided with an end surface positioning plate 201;

[0050] The rear side of the end surface positioning plate 201 is used to abut against (abut against and contact) the front end surface 104 at the front end of the pull rod blank 1-0.

[0051] In the present application, the upper end surface of the limiting block 2 is provided with a threaded rod positioning surface 202;

[0052] The lower end of the limiting block 2 is longitudinally provided with two left and right spaced positioning pull rod mounting holes 203;

[0053] Each of the two positioning pull rod mounting holes 203 is longitudinally provided with a positioning pull rod 3;

[0054] The front end of the positioning pull rod 3 protrudes forwardly from the front end surface of the limiting block 2, and the circumferential outer side of the front end of the positioning pull rod 3 is sleeved with a first compression spring 81;

[0055] The front end of the positioning pull rod 3 is threadedly connected with a first nut 71;

[0056] The front and rear ends of the first compression spring 81 are respectively abutted against (abut against and contact) the rear end surface of the first nut 71 and the front end surface of the limiting block 2.

[0057] It should be noted that the positioning pull rod 3 is installed into the pull rod mounting hole 203 from the rear side of the limiting block 2, and the front end of the positioning pull rod 3 is sleeved with the first compression spring 81 and is screwed with the first nut 71.

[0058] In particular, the upper and lower sides of the positioning pull rod mounting hole 203 are respectively provided with horizontally distributed anti-rotation surfaces 205;

[0059] Specifically, the transverse center position of the limiting block 2 is vertically provided with a double-end bolt mounting hole 204;

[0060] The double-end bolt mounting hole 204, which is an internally threaded hole, is threadedly fixedly connected with the lower part of the vertically distributed double-end bolt 6.

[0061] It should be noted that the upper end surface center of the limiting block 2 is provided with a double-end bolt mounting hole 204 penetrating the upper and lower planes;

[0062] In the present application, specifically, the rear end part (i.e. the head part) of the positioning pull rod 3 is provided with a centering shaft anti-rotation groove 301;

[0063] The center position of the centering shaft anti-rotation groove 301 is provided with a centering shaft mounting hole 302;

[0064] The centering shaft 4 is installed in the centering shaft mounting hole 302;

[0065] The centering shaft mounting hole 302 vertically penetrates the upper and lower planes of the positioning pull rod 3;

[0066] The longitudinal middle part of the positioning pull rod 3 is provided with a rod part 303;

[0067] The upper and lower sides of the rod part 303 are respectively provided with anti-rotation flats 304;

[0068] The front end part (i.e. the tail part) of the pull rod 3 is provided with a threaded end 305;

[0069] The rear end part (i.e. the head part) of the positioning pull rod 3 is provided with a rod shoulder 306 at the junction with the rod part 303;

[0070] Specifically, the anti-rotation flats 304 on the upper and lower sides of the rod part 303 are correspondingly arranged and in contact with the anti-rotation surfaces 205 on the upper and lower sides of the positioning pull rod mounting hole 203 of the limiting block 2.

[0071] In the present application, specifically, the front end left and right sides of the upper head part 400 of the centering shaft 4 are respectively provided with one centering arc surface 401 (there are two centering arc surfaces 401 in total);

[0072] The vertical middle part of the centering shaft 4 is provided with a clamping flat 402;

[0073] The lower part of the centering shaft 4 is provided with a threaded tightening end 403;

[0074] Specifically, the threaded tightening end 403 of the centering shaft 4 is installed in the centering shaft mounting hole 302 of the positioning pull rod 3;

[0075] The clamping flat 402 is located in the centering shaft anti-rotation groove 301 of the positioning pull rod 3;

[0076] The threaded end 403 of the lower part of the centering shaft 4 is threadedly fixedly connected with a third nut 73 after penetrating through the centering shaft mounting hole 302 of the rear end (i.e. the head) of the positioning pull rod 3 vertically;

[0077] Further, the top surface of the third nut 73 abuts against (i.e. abuts tightly contacts) the bottom surface of the rear end of the positioning pull rod 3.

[0078] It should be noted that, in specific implementation, the centering cam surface 401 of the centering shaft 4 is arranged forwardly; the threaded end 403 of the lower part of the centering shaft 4 is mounted in the centering shaft mounting hole 302 of the positioning pull rod 3;

[0079] It should be noted that the clamping flat 402 of the centering shaft 4 falls in the centering shaft anti-rotation groove 301 of the positioning pull rod 3, and is screwed on the threaded end 403 of the lower part of the centering shaft 4 by the third nut 73;

[0080] In the present application, in specific implementation, the lower end of the stud bolt 6 is threadedly fixedly connected with the stud bolt mounting hole 204 at the center position of the limiting block 2.

[0081] In specific implementation, the middle part of the stud bolt 6 is sleeved with a second compression spring 82 on the outer side in the circumferential direction;

[0082] The upper part of the stud bolt 6 is connected with the center position of the pressing plate 5;

[0083] The second compression spring 82 is located between the limiting block 2 and the pressing plate 5;

[0084] Further, the lower end of the stud bolt 6 is also threadedly fixedly connected with a fourth nut 74;

[0085] The bottom surface of the fourth nut 74 abuts against (i.e. abuts tightly contacts) the threaded rod positioning surface 202 on the limiting block 2;

[0086] The bottom of the second compression spring 82 abuts against (i.e. abuts tightly contacts) the top of the fourth nut 74;

[0087] The top of the second compression spring 82 abuts against (i.e. abuts tightly contacts) the bottom surface of the pressing plate 5;

[0088] Further, the upper part of the stud bolt 6 is threadedly fixedly connected with a second nut 72 after penetrating through the stud bolt hole 501 of the pressing plate 5 upwardly.

[0089] It needs to be explained that the lower end of the stud bolt 6 is installed in the stud bolt mounting hole 204 and is tightened by the fourth nut 74, and the second compression spring 82 is arranged above the fourth nut 74 and is sleeved on the circumferential outer side of the stud bolt 6; the upper part of the stud bolt 6 passes through the stud bolt hole 501 arranged in the center of the pressing plate 5 and is tightened on the top of the stud bolt 6 by the second nut 72; and the lower plane of the pressing plate 5 is provided with a pressing surface 502.

[0090] In the present application, the stud bolt hole 501 is arranged in the central position of the pressing plate 5 and is vertically penetrated;

[0091] The stud bolt hole 501 is threadedly connected with the upper part of the stud bolt 6.

[0092] The bottom surface of the pressing plate 5 is provided with the horizontally distributed pressing surface 502.

[0093] The pressing surface 502 of the pressing plate 5 is used for pressing downward the top of the threaded rod 103 of the pull rod blank 1-0 located below the pressing surface 502.

[0094] In order to more clearly understand the technical scheme of the present application, the working process of the present application is described below.

[0095] In the first step, the device of the present application is fixed on the workbench of the line cutting machine tool, the pressing plate 5 is loosened, and the pressing plate 5 is rotated to be parallel to the axial direction of the positioning pull rod 3 (i.e. longitudinally distributed);

[0096] In the second step, one of the positioning pull rods 3 is pushed to the rear side, the positioning surface (i.e. the lower end surface 104) at the front end of one pull rod blank 1-0 to be processed is placed at one end, and the pull rod through hole 102 at the rear end of the pull rod blank 1-0 is sleeved on the outer side of one centering shaft 4 (for example, the left positioning shaft 4);

[0097] In the third step, the threaded rod 103 of the pull rod blank 1-0 is abutted against the threaded rod positioning surface 202 at the top of the limiting block 2, the positioning pull rod 3 is loosened, the positioning pull rod 3 is driven by the first compression spring 81 at the front side to move to the front side, until the two centering arc surfaces 401 on the centering shaft 4 are abutted against the inner side (i.e. the inner hole wall at the front side) of the pull rod through hole 102 on the pull rod blank 1-0 to be processed, at this time, the positioning surface (i.e. the lower end surface 104) at the front end of the pull rod blank 1-0 is abutted against the rear side of the end surface positioning plate 201 of the limiting block 2, and the pre-pressing of the pull rod blank 1-0 is realized, at this time, the positioning of one pull rod blank 1-0 in the device of the present application is completed.

[0098] In the fourth step, the other pull rod blank 1-0 to be processed is also placed on the device (for example, the right side) of the present application, and the operations of the second step and the third step are repeated.

[0099] In the fifth step, the pressing plate 5 is rotated by 90° to be horizontally distributed, and the pressing plate 5 is pressed on the threaded rod 103 of the two to-be-processed pull rod blank pieces 1-0, and the pressing plate 5 is tightened to realize the positioning operation of the workpiece.

[0100] After the fifth step, a sixth step can be further performed: starting the wire cutting machine on the wire cutting machine tool to perform the machining operation of the semicircular surface 106 and the small arc surface 107 on the pull rod blank piece 1-0, and finally obtaining the finished product of the pull rod 1.

[0101] Specifically, the wire cutting machine tool is a mature mechanical machining equipment in the prior art, for example, a DK7740ZG type medium-speed wire cutting machine tool produced by Taizhou Shuanghua Numerical Control Machine Tool Co., Ltd. can be used. The wire cutting machine tool cuts metal through electric spark discharge. The wire cutting machine tool can control the precise movement of the workbench or the electrode wire (for example, molybdenum wire with a diameter of 0.02 to 0.3㎜) through the computer numerical control (CNC) system matched with the wire cutting machine tool, so that countless micro discharge points continuously act, and finally a part with a designed shape is machined.

[0102] Based on the above-mentioned processing positioning device for a pull rod provided by the present application, the present application further provides a processing system for a pull rod, which comprises the processing positioning device for a pull rod as described above.

[0103] Specifically, the processing positioning device for a pull rod provided by the present application further comprises a wire cutting machine tool.

[0104] The wire cutting machine tool is used to perform the machining operation of the semicircular surface 106 and the small arc surface 107 on the pull rod blank piece 1-0 through the molybdenum wire thereon, and finally obtain the finished product of the pull rod 1.

[0105] In the present application, specifically, the wire cutting machine tool is a mature mechanical machining equipment in the prior art, and will not be described here.

[0106] Compared with the prior art, the processing positioning device for a pull rod provided by the present application has the following beneficial effects:

[0107] 1. The present application adopts the structure of combining the positioning pull rod 3 and the centering shaft 4 to center and position the positioning hole (i.e., the pull rod through hole 102) on the pull rod blank piece 1-0, which can not be affected by the positioning hole tolerance and realize accurate centering.

[0108] It needs to be explained that for the present application, the positioning pull rod 3 installed in the limiting block 2 will give the centering shaft 4 a pulling force to the front side of the device under the action of the first compression spring 81, and after the pull rod blank 1-0 to be processed is installed, a forward pressure will be applied to the workpiece. The centering shaft 4 is provided with two left and right centering camber surfaces 401 which are centrally symmetrical and which are in abutment with the pull rod through hole 102 under the action of the pulling force. Since the centering camber surfaces 401 are centrally symmetrical, the symmetrical axes of the two centering camber surfaces 401 coincide with the center of symmetry of the pull rod blank 1-0 when the two centering camber surfaces 401 are in abutment with the pull rod through hole 102 of the pull rod blank 1-0 at the same time.

[0109] Specifically, as shown in the figure, the outer side (i.e. the rear side) of the upper head 400 of the centering shaft 4 is provided with a first camber surface 404, and the inner side (i.e. the front side) of the upper head 400 is provided with two left and right centering camber surfaces 401. The circumscribed circle A of the first camber surface 404 and the two centering camber surfaces 401 is smaller in size than the pull rod through hole 102 (for example, 2 mm smaller in diameter), which facilitates the loading and unloading of the workpiece. Figure 9f

[0110] It needs to be explained that the circumscribed circle A of the centering shaft 4 is a circle with the center of the centering shaft 4 as the center, and the first camber surface 404 and the two centering camber surfaces 401 are both inscribed in the circle.

[0111] If the diameter of the circumscribed circle (i.e. the circumscribed circle of the centering shaft 4) of the first camber surface 404 and the two centering camber surfaces 401 is greater than the diameter of the pull rod through hole 102, then the upper head 400 of the centering shaft 4 cannot pass through the pull rod through hole 102 of the pull rod blank 1-0, and thus the pull rod through hole 102 cannot be positioned. Therefore, the present application requires that the circumscribed circle A of the first camber surface 404 and the two centering camber surfaces 401 is smaller in size than the pull rod through hole 102 (for example, 2 mm smaller in diameter).

[0112] 2. The present application adopts the structure of combining the positioning pull rod with the compression screw (i.e. the double-headed bolt 6), which facilitates the loading and unloading of the workpiece and the pre-compression.

[0113] Through the application of the present application, the problem of machining the complex shape of the pull rod head (i.e. machining the semicircular camber surface 106 at the rear end of the flat rod head 101 and the small camber surfaces 107 on the left and right sides of the front end) is solved. The present application has a reasonable structure, facilitates the loading and unloading of the workpiece, and significantly improves the work efficiency.

[0114] The above only describes the preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.​

Claims

1. A machining and positioning device for a tie rod, characterized in that, Including limit block (2); At the lower end of the limiting block (2), two positioning rods (3) are longitudinally through it; At the rear ends of the two positioning rods (3), a centering shaft (4) is provided respectively; The lower end of the double-ended bolt (6) is connected to the center of the limiting block (2); The upper end of the double-ended bolt (6) is connected to the center of the horizontally distributed pressure plate (5); The upper part of the centering shaft (4) is set in the tie rod through hole (102) at the rear end of the tie rod blank (1-0) to be processed; Pressure plate (5) is used to press down the threaded rod (103) at the front end of the tie rod blank (1-0); The upper front side of the limiting block (2) is provided with an end face positioning plate (201) protruding upward; The rear side of the end face positioning plate (201) is used to abut against the front end face (104) of the front end of the tie rod blank (1-0).

2. The processing and positioning device for the tie rod as described in claim 1, characterized in that, The upper end face of the limiting block (2) is provided with a threaded rod positioning surface (202); The lower end of the limiting block (2) has two positioning tie rod mounting holes (203) that are spaced apart on the left and right sides. In each positioning tie rod mounting hole (203), a positioning tie rod (3) is installed longitudinally through it; The front end of the positioning rod (3) protrudes forward beyond the front end face of the limiting block (2), and a first compression spring (81) is sleeved on its circumferential outer side; The front end of the positioning rod (3) is threadedly connected to the first nut (71); The front and rear ends of the first compression spring (81) abut against the rear end face of the first nut (71) and the front end face of the limiting block (2), respectively.

3. The processing and positioning device for the tie rod as described in claim 1, characterized in that, The upper and lower sides of the positioning tie rod mounting hole (203) are respectively provided with horizontally distributed anti-rotation surfaces (205); The center of the limiting block (2) is provided with a double-headed bolt mounting hole (204) that runs vertically through it; The double-ended bolt mounting hole (204) is threadedly fixed to the lower part of the vertically distributed double-ended bolt (6).

4. The processing and positioning device for the tie rod as described in claim 1, characterized in that, The rear end of the positioning tie rod (3) is provided with a centering shaft anti-rotation groove (301); A centering shaft mounting hole (302) is provided at the center position of the anti-rotation groove (301) of the centering shaft; A centering shaft (4) is installed in the centering shaft mounting hole (302); The centering shaft mounting hole (302) penetrates vertically through the upper and lower planes of the positioning tie rod (3); The positioning tie rod (3) has a rod part (303) in the longitudinal middle; Anti-rotation flattening (304) is provided on the upper and lower sides of the rod (303); The front end of the pull rod (3) is provided with a threaded end (305); A shoulder (306) is provided at the junction of the rear end of the positioning tie rod (3) and the rod part (303).

5. The processing and positioning device for the tie rod as described in claim 4, characterized in that, The anti-rotation flattening (304) on the upper and lower sides of the rod (303) is correspondingly set to the anti-rotation surface (205) on the upper and lower sides of the positioning rod mounting hole (203) of the limit block (2), and is in contact with it.

6. The processing and positioning device for the tie rod as described in claim 1, characterized in that, On the left and right sides of the front end of the upper head (400) of the centering shaft (4), a centering arc surface (401) is provided respectively; A clip (402) is provided at the vertical center of the centering shaft (4); The lower part of the centering shaft (4) is provided with a threaded tightening end (403).

7. The processing and positioning device for the tie rod as described in claim 6, characterized in that, The threaded end (403) of the centering shaft (4) is installed in the centering shaft mounting hole (302) of the positioning tie rod (3); The flattened part (402) is located in the anti-rotation groove (301) of the centering shaft of the positioning tie rod (3); The threaded end (403) at the lower part of the centering shaft (4) is threadedly fixed to a third nut (73) after passing vertically through the centering shaft mounting hole (302) at the rear end of the positioning tie rod (3).

8. The machining and positioning device for the tie rod as described in any one of claims 1 to 7, characterized in that, The lower end of the double-ended bolt (6) is threadedly fixed to the double-ended bolt mounting hole (204) at the center of the limiting block (2); A second compression spring (82) is fitted around the middle circumferentially outside the double-ended bolt (6); The upper part of the double-ended bolt (6) is connected to the center of the pressure plate (5); The second compression spring (82) is located between the limiting block (2) and the pressure plate (5); The lower end of the double-ended bolt (6) is also threadedly fixed to a fourth nut (74); The bottom surface of the fourth nut (74) abuts against the threaded rod positioning surface (202) on the limiting block (2); The upper part of the double-ended bolt (6) passes through the double-ended bolt hole (501) on the pressure plate (5) and is then threadedly fixed to a second nut (72).

9. The processing and positioning device for the tie rod as described in claim 1, characterized in that, At the center of the pressure plate (5), there is a vertically penetrating double-headed bolt hole (501); The double-ended bolt hole (501) is threaded to the upper part of the double-ended bolt (6); The bottom surface of the pressure plate (5) has horizontally distributed pressing surfaces (502); The pressing surface (502) of the pressure plate (5) is used to press down on the top of the threaded rod (103) of the tie rod blank (1-0) located below it.

10. A machining system for a tie rod, characterized in that, The device includes a machining and positioning device for a tie rod as described in any one of claims 1 to 9.

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