End pin flattening machining and positioning device for bolt pin

Abstract

The utility model discloses an end pin flattening machining and positioning device for a bolt pin. The end pin flattening machining and positioning device comprises a bottom plate, a positioning block, an inclined pressing plate, a cover plate, a pressing nail and a pin. A positioning block is vertically arranged in the longitudinal middle of the top of the bottom plate; a cover plate which is transversely and horizontally distributed is fixedly arranged at the top of the positioning block; a pressing nail is vertically arranged on the cover plate in a penetrating manner; the pressing nail is in threaded connection with the cover plate; the lower end of the pressing nail is pivoted with the top of an inclined pressing plate which is vertically distributed; the inclined pressing plate is positioned inside the positioning block; and the inclined pressing plate is used for pressing and positioning the to-be-machined bolt pin blank placed on the inner side of the positioning block. The machining and positioning device for the end pin flat of the bolt pin is scientific in structural design, bolt pins with different diameters and different specifications and models can be conveniently and reliably machined and positioned, the machining and positioning requirements of the end pin flat of a plurality of bolt pins with different specifications and models can be met, and the machining precision of a workpiece is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a device for processing and positioning the flattened end of a bolt pin. Background Art

[0002] See also Figure 1 As shown, the bolt pin 1 is a common part in mechanical products, and is often used to connect two relatively rotating workpieces. Its function is to connect two related parts together and ensure that they can rotate relatively around the bolt pin 1.

[0003] See also Figure 2 As shown, the left end of the bolt pin blank 1-0 is a hexagonal head 101, the right end face of the hexagonal head 101 is a head positioning end face 102, the middle part of the bolt pin blank 1-0 is an axis center 103, the right side of the axis center 103 is a bare rod axis 104-0, the right part of the bolt pin blank 1-0 is an anti-slip blank end 105-0, and the right end of the anti-slip blank end 105-0 is provided with a tail positioning reserved end face 108-0;

[0004] See also Figure 1 As shown, the structure of the finished bolt pin 1 obtained after the bolt pin blank 1-0 is processed is similar to that of a standard bolt, the left end of which is a hexagonal head 101 for easy operation with a wrench, the right end face of the hexagonal head 101 is a head positioning end face 102, the middle part of the bolt pin 1 is the shaft center 103, and the right side part of the shaft center 103 is a threaded shaft 104 (after the processing of the pin flat 106 is completed, the bare rod shaft 104-0 is processed through another processing step to obtain the thread at the threaded shaft 104), the right part of the bolt pin 1 is an anti-slip finished end 105, the front and rear sides of the anti-slip finished end 105 are provided with a pin flat 106, the middle part of the pin flat 106 is provided with an open pin hole 107 running longitudinally from front to back, and the right end face of the anti-slip finished end 105 is provided with a tail positioning finished end face 108.

[0005] Depending on different requirements, the processing of the pin flat 106 on the bolt pin blank 1-0 usually includes two positioning methods: positioning by the head positioning end face 102 (the pin flat 106 starts from the distance L between the head positioning end face 102 and extends to the tail end), and positioning by the tail positioning reserved end face 108-0 (the pin flat 106 starts from the tail positioning reserved end face 108-0 and extends to the distance L′ between the tail positioning reserved end face 108-0). The bolt pins 1 to be processed of different specifications have different diameters D.

[0006] However, there is currently no device that can conveniently and reliably process and position multiple bolt pins of different specifications and models with different diameters, which is conducive to meeting the processing and positioning requirements of the end pin flattening of bolt pins of different specifications and models and ensuring the processing accuracy of the workpiece. Utility Model Content

[0007] The utility model aims to provide a device for processing and positioning the flattened end of a bolt pin in view of the technical defects in the prior art.

[0008] To this end, the utility model provides a bolt pin end flattening processing positioning device, which includes a bottom plate, a positioning block, an inclined pressure plate, a cover plate, a clamping nail and a pin;

[0009] Wherein, a positioning block is vertically arranged in the longitudinal middle of the top of the bottom plate;

[0010] A cover plate distributed horizontally is fixedly arranged on the top of the positioning block;

[0011] A clamping nail is vertically provided on the cover plate;

[0012] The clamping nail is threadedly connected to the cover plate;

[0013] The lower end of the pressing nail is pivotally connected to the top of a vertically distributed inclined pressure plate;

[0014] The inclined pressure plate is located inside the positioning block;

[0015] The inclined pressure plate is used to press and position the bolt pin blank to be processed which is placed inside the positioning block.

[0016] It can be seen from the technical solution provided by the above utility model that, compared with the prior art, the utility model provides a device for processing and positioning the end pin flattening of a bolt pin, which has a scientific structural design and can conveniently and reliably process and position bolt pins of different specifications and models with different diameters, which is conducive to meeting the processing and positioning requirements of the end pin flattening of multiple bolt pins of different specifications and models, ensuring the processing accuracy of the workpiece, and has great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 : A three-dimensional view of the finished bolt pin obtained after the bolt pin blank to be processed is completed;

[0018] Figure 2 : A three-dimensional view of a bolt pin blank to be processed before being processed using the device of the utility model;

[0019] Figure 3a : The utility model provides a bolt pin end flattening processing and positioning device, a three-dimensional view of the bolt pin blank when positioning and clamping it from the tail;

[0020] Figure 3b : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the tail, and completes the three-dimensional view during the pin flattening processing;

[0021] Figure 4a : The utility model provides a bolt pin end flattening processing and positioning device, a three-dimensional view of the bolt pin blank when it is positioned and clamped from the head;

[0022] Figure 4b : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the head and completes the three-dimensional view during the pin flattening processing;

[0023] Figure 5 : A three-dimensional view of a bolt pin end flattening processing and positioning device provided by the utility model before clamping a workpiece to be processed (i.e., a bolt pin blank);

[0024] Figure 6a : A bolt pin end flattening processing and positioning device provided by the utility model is a rear view when positioning and clamping a bolt pin blank from the tail (the bolt pin blank is omitted in this figure);

[0025] Figure 6b : A bolt pin end flattening processing and positioning device provided by the utility model is a right view when positioning and clamping a bolt pin blank from the tail (the bolt pin blank is omitted in this figure);

[0026] Figure 6c : A bolt pin end flattening processing and positioning device provided by the utility model is a front view when positioning and clamping a bolt pin blank from the tail (the bolt pin blank is omitted in this figure);

[0027] Figure 6d : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the tail, and completes the top view of the pin flattening processing;

[0028] Figure 7a : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the head and completes the pin flattening processing;

[0029] Figure 7b : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the head and completes the right view of the pin flattening processing;

[0030] Figure 7c : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the head and completes the front view of the pin flattening processing;

[0031] Figure 7d : The utility model provides a bolt pin end flattening processing positioning device, which positions and clamps the bolt pin blank from the head, and completes the top view of the pin flattening processing;

[0032] Figure 8a :In the end pin flattening processing and positioning device of a bolt pin provided by the utility model, the three-dimensional view of the bottom plate Figure 1 ;

[0033] Figure 8b :In the end pin flattening processing and positioning device of a bolt pin provided by the utility model, the three-dimensional view of the bottom plate Figure 2 ;

[0034] Figure 9a :In the end pin flattening processing and positioning device of a bolt pin provided by the utility model, the three-dimensional view of the positioning block Figure 1 ;

[0035] Figure 9b :In the end pin flattening processing and positioning device of a bolt pin provided by the utility model, the three-dimensional view of the positioning block Figure 2 ;

[0036] Fig.10 : A three-dimensional view of an inclined pressure plate in a bolt pin end flattening processing and positioning device provided by the utility model;

[0037] Fig.11a :In the end pin flattening processing and positioning device of a bolt pin provided by the utility model, the three-dimensional view of the limit block Figure 1 ;

[0038] Fig.11b :In the end pin flattening processing and positioning device of a bolt pin provided by the utility model, the three-dimensional view of the limit block Figure 2 ;

[0039] Fig.12 : A three-dimensional view of a cover plate in a bolt pin end flattening processing and positioning device provided by the utility model;

[0040] Fig.13 : A front view of a clamping pin in a bolt pin end flattening processing and positioning device provided by the utility model;

[0041] Fig.14 : A three-dimensional view of a pin in a bolt pin end flattening processing and positioning device provided by the utility model;

[0042] In the figure, 1, bolt pin; 101, hexagonal head; 102, head positioning end face; 103, shaft center; 104, threaded shaft; 105, anti-slip end; 106, pin flat; 107, cotter pin hole; 108, tail positioning finished product end face;

[0043] 2. Bottom plate; 201. Positioning groove; 202. Positioning block mounting hole; 203. Pressing platform;

[0044] 3. Positioning block; 301. Bottom threaded hole; 302. Positioning and clamping groove; 303. Pressure-bearing surface; 304. V-shaped positioning groove; 305. Common screw hole; 306. Horizontal screw hole; 307. Vertical screw hole; 308. Inclined pressure plate slideway; 309. Cover plate mounting platform; 310. Cover plate mounting hole;

[0045] 4. Oblique pressure plate; 401. Compression pin insertion hole; 402. Pin hole; 403. Left straight surface; 404. Oblique pressure plate groove; 405. Compression inclined surface;

[0046] 5. Limit block; 501. Positioning bent rod; 502. Limit surface; 503. Limit block mounting platform; 504. Limit block mounting hole; 505. Platform bottom;

[0047] 6. Cover plate; 601. Cover plate countersunk hole; 602. Cover plate slot; 603. Pressing nail threaded hole;

[0048] 7. Clamping nail; 701. Column end; 702. Arc groove; 703. Stud;

[0049] 8. Sales. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0051] 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.

[0052] 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.

[0053] 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 utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0054] See also Figure 1 , Figure 2 , Figure 3a to Figure 3b , Figure 4a to Figure 4b , Figure 5 , Figures 6a to 6d , Figures 7a to 7d , Figure 8a to Figure 8b , Figure 9a to Figure 9b , Fig.10 , Figure 11a to Figure 11b , Figure 12 to Figure 14 The utility model provides a bolt pin end flattening processing positioning device, comprising a bottom plate 2, a positioning block 3, an inclined pressure plate 4, a cover plate 6, a clamping pin 7 and a pin 8;

[0055] Wherein, a positioning block 3 is vertically arranged in the longitudinal middle of the top of the bottom plate 2;

[0056] A cover plate 6 distributed horizontally is fixedly arranged on the top of the positioning block 3;

[0057] A clamping nail 7 is vertically penetrated through the cover plate 6;

[0058] The pressing pin 7 is threadedly connected to the cover plate 6;

[0059] The lower end of the pressing pin 7 is pivotally connected (i.e., rotatably connected) to the top of a vertically distributed inclined pressing plate 4;

[0060] The inclined pressure plate 4 is located inside the positioning block 3;

[0061] The inclined pressure plate 4 is used to press and position the bolt pin blank 1 - 0 to be processed placed inside the positioning block 3 .

[0062] In this utility model, see Figure 8a , Figure 8b As shown, a laterally distributed press platform 203 is respectively provided on the front and rear sides of the upper plane of the bottom plate 2;

[0063] The bottom plate 2 is placed horizontally on an external workbench.

[0064] It should be noted that, for the present invention, the press table 203 can be pressed downward by means of an external pressing device or a universal pressing plate on a machine tool, and the device can be installed on a workbench.

[0065] In specific implementation, a positioning groove 201 is provided in the longitudinal middle of the bottom plate 2 and runs through it transversely;

[0066] A positioning block mounting hole 202 is provided at the left and right ends of the positioning groove 201;

[0067] The two positioning block mounting holes 202 are symmetrically distributed.

[0068] In this utility model, see Figure 9a , Figure 9b As shown, the bottom of the positioning block 3 is provided with a bottom threaded hole 301 at a position corresponding to each positioning block mounting hole 202 on the bottom plate 2;

[0069] The positioning block 3 is fixed in the positioning groove 201 of the base plate 2 by two first hexagon socket screws;

[0070] The first hexagon socket screw passes through the positioning block mounting hole 202 on the bottom plate 2 from bottom to top, and is threadedly fixedly connected with the bottom threaded hole 301 on the positioning block 3.

[0071] It should be noted that, for the present invention, the positioning block 3 is threadedly connected to the bottom threaded hole 301 of the positioning block 3 by two first hexagon socket screws passing through the positioning block mounting hole 202 from bottom to top, and the positioning block 3 is fixedly set in the positioning groove 201.

[0072] It should be noted that the width of the positioning block 3 matches the width of the positioning groove 201 of the bottom plate 2 .

[0073] In the present utility model, a positioning and pressing groove 302 which is open upward (i.e., open) and passes through longitudinally is provided in the middle of the positioning block 3;

[0074] The inclined pressure plate 4 is located in the positioning and pressing groove 302 .

[0075] In specific implementation, the left side of the positioning and pressing groove 302 is the pressure-bearing surface 303;

[0076] A V-shaped positioning groove 304 opening to the left is provided at the lower right side of the positioning and pressing groove 302 (specifically, the lower middle part);

[0077] The right side of the positioning and pressing groove 302 of the positioning block 3 is provided with an inclined pressure plate slideway 308;

[0078] The inclined pressure plate slideway 308 is located above the V-shaped positioning groove 304;

[0079] In a specific implementation, a V-shaped stop surface 311 is provided on the rear side of the positioning block 3 .

[0080] That is to say, a V-shaped stop surface 311 is disposed at the rear side of the V-shaped positioning groove 304 .

[0081] In specific implementation, a common screw hole 305 and a horizontal screw hole 306 are provided on the front right side of the positioning block 3;

[0082] Furthermore, the center points of the common screw hole 305 and the transverse screw hole 306 are located on the same horizontal straight line, and are also located on the same straight line as the symmetric center line of the V-shaped positioning groove 304 .

[0083] It should be noted that, for the present invention, the center points of the common screw hole 305 and the transverse screw hole 306 are at the same height as the symmetric center line of the V-shaped positioning groove 304 .

[0084] In specific implementation, the positioning block 2 is provided with a vertical screw hole 307 directly below the common screw hole 305;

[0085] Furthermore, the distance between the common screw hole 305 and the vertical screw hole 307 is equal to the distance between the common screw hole 305 and the horizontal screw hole 306 .

[0086] In specific implementation, a cover plate mounting platform 309 and a cover plate mounting hole 310 are respectively provided on the left and right sides of the top of the positioning block 3;

[0087] The cover plate 6 is fixed to the top of the positioning block 3 by two second hexagon socket screws;

[0088] See also Fig.12 As shown, the cover plate 6 is provided with a cover plate countersunk hole 601 at a position corresponding to each cover plate mounting hole 310 on the positioning block 3;

[0089] The second hexagon socket screw passes through the cover plate countersunk hole 601 from top to bottom and is threadedly fixedly connected with the cover plate mounting hole 310 (an internal threaded hole) on the positioning block 3;

[0090] In this utility model, see Fig.12 As shown, the lower end surface of the cover plate 6 is provided with a cover plate slot 602;

[0091] A slot protrusion 6020 is provided at the left and right ends of the cover plate slot 602;

[0092] The two slot protrusions 6020 are arranged opposite to the two cover plate mounting platforms 309 at the top of the positioning block 3;

[0093] The slot protrusion 6020 is located in the cover mounting platform 309 .

[0094] It should be noted that, for the utility model, the lower end surface of the cover plate 6 is provided with a cover plate slot 602, whose size matches the cover plate mounting platform 309, which can prevent the positioning block 3 from being pushed outward due to force during operation, thereby ensuring the overall structural strength of the device of the utility model.

[0095] In specific implementation, a pressing nail 7 is vertically penetrated through the left end of the cover plate 6;

[0096] The clamping pin 7 is threadedly connected with the clamping pin threaded hole 603 on the cover plate 6;

[0097] Furthermore, a pressing nail threaded hole 603 is provided at the left side of the middle of the cover plate 6;

[0098] See also Fig.13 As shown, the middle part of the pressing nail 7 has a stud 703;

[0099] The pressing pin 7 is threadedly installed in the pressing pin threaded hole 603 of the cover plate 6 through the stud 703 .

[0100] In this utility model, see Fig.13 As shown, the lower end of the pressing nail 7 has a cylindrical end 701;

[0101] A top opening pressing pin insertion hole 401 is provided at the top of the inclined pressing plate 4 at a position corresponding to the columnar end 701;

[0102] The circumferential outer wall of the cylindrical end 701 is circumferentially provided with an arc groove 702;

[0103] The inclined pressure plate 4 is provided with two pin holes 402 which are longitudinally penetrating (i.e. penetrating the front and rear sides);

[0104] The pin hole 402 passes longitudinally through the pressing pin penetration hole 401;

[0105] The cylindrical end 701 is vertically inserted into the pressing pin penetration hole 401;

[0106] A pin 8 is inserted through each pin hole 402;

[0107] The middle sections of the two pins 8 are located on the left and right sides of the arc groove 702 of the cylindrical end 701 placed in the pressing pin penetration hole 401. In other words, the two pins 8 are used to limit the two sides of the cylindrical end 701. The cylindrical pin 8 is half-embedded in the arc groove 702 with a semicircular cross section on the cylindrical end 701, and at the same time, it does not affect the horizontal rotation of the cylindrical end 701.

[0108] It should be noted that, for the present invention, the cylindrical end 701 is inserted into the clamping pin insertion hole 401 of the inclined pressure plate 4, and two pins 8 are sequentially inserted through the pin hole 402 on the inclined pressure plate 4 and the arc groove 702 on the cylindrical end 701 for positioning. During operation, by rotating the clamping pin 7, the inclined pressure plate 4 can be driven to move up and down together, thereby adjusting the upper and lower positions of the inclined pressure plate 4 in the positioning clamping groove 302.

[0109] Among them, the cylindrical end 701 can be constrained in the clamping pin through hole 401 by two pins 8, and the relative position of the cylindrical end 701 and the clamping pin through hole 401 of the inclined pressure plate 4 in the vertical direction remains unchanged, and will not affect the horizontal rotation of the clamping pin 7 and the cylindrical end 701 thereon. When the clamping pin 7 is rotated clockwise, the clamping pin 7 moves down along the clamping pin threaded hole 603 on the cover plate 6. When the clamping pin 7 is rotated counterclockwise, the clamping pin 7 moves upward along the clamping pin threaded hole 603 on the cover plate 6.

[0110] In this utility model, see Fig.10 As shown, the left side of the oblique pressure plate 4 is provided with a left straight surface 403;

[0111] The left straight surface 403 contacts the pressure-bearing surface 303 on the positioning block 3;

[0112] An inclined pressure plate groove 404 is provided on the upper right side of the inclined pressure plate 4;

[0113] The inclined pressure plate groove 404 is slidably matched with the inclined pressure plate slideway 308 on the positioning block 3;

[0114] A pressing inclined surface 405 is provided at the lower right side of the inclined pressure plate 4, which is used to press and position the bolt pin blank 1-0 to be processed placed inside the positioning block 3. Specifically, it is used to cooperate with the V-shaped positioning groove 304 in the positioning block 3 to press and position the shaft center 103 in the middle of the bolt pin blank 1-0 located between the two V-shaped positioning surfaces of the V-shaped positioning groove 304 and the inclined pressure plate 4.

[0115] It should be noted that when the workpiece is being processed, the left straight surface 403 abuts against the pressure surface 303 on the positioning block 3. The inclined pressure plate groove 404 is matched and connected (interlocked) with the inclined pressure plate slideway 308 on the positioning block 3, which can guide the inclined pressure plate 3 not to fall out of the slideway when performing up and down movements. A clamping inclined surface 405 is provided at the lower right side of the inclined pressure plate 4, which is used to abut against the workpiece to be processed (i.e., the bolt pin blank 1-0) placed in the positioning clamping groove 302 of the positioning block 3 when processing the workpiece, so as to achieve clamping and positioning.

[0116] In the present utility model, referring to FIG. 3 to FIG. Figure 5 As shown, a limiting block 5 is provided at the front right end of the positioning block 3;

[0117] The limiting block 5 is used to limit the tail positioning reserved end face 108-0 on the bolt pin blank 1-0 when the processing requirement for the end pin flat 106 of the bolt pin blank 1-0 is to be positioned with the tail positioning reserved end face 108-0.

[0118] In this utility model, see Fig.11a , Fig.11bAs shown, a positioning bent rod 501 is provided on the left side of the limit block 5;

[0119] A limiting surface 502 is provided on the rear side of the positioning bent rod 501.

[0120] A limit block mounting platform 503 is provided on the right side of the limit block 5;

[0121] The rear side of the limit block mounting platform 503 is the platform bottom 505;

[0122] The limit block mounting platform 503 is provided with two limit block mounting holes 504 which are symmetrically distributed on the left and right sides;

[0123] The two limit block mounting holes 504 are respectively arranged corresponding to the common screw hole 305 and the horizontal screw hole 306 on the front side of the right end of the positioning block 3;

[0124] The limiting block 5 is fixed on the positioning block 3 by two hexagonal bolts.

[0125] In specific implementation, when the processing of the end pin flat 106 of the bolt pin blank 1-0 requires positioning with the tail positioning reserved end face 108-0, two hexagonal head bolts pass through the limit block mounting hole 504 from front to back and are respectively threaded and fixedly connected with the common screw hole 305 and the horizontal screw hole 306. At this time, the limit surface 502 on the rear side of the positioning bent rod 501 is in tight contact with the tail positioning reserved end face 108-0 of the bolt pin blank 1-0.

[0126] In specific implementation, when the end pin flat 106 of the bolt pin blank 1-0 is processed and it is required to be positioned with the head positioning end face 102, the two hexagonal head bolts pass through the limit block mounting hole 504 from front to back and are threadedly fixedly connected with the common screw hole 305 and the vertical screw hole 307 respectively.

[0127] It should be noted that, for the utility model, the limit block 5 is installed in two of the three threaded holes on the right side of the V-shaped positioning groove 304 of the positioning block 3 (i.e., the common screw hole 305 and the horizontal screw hole 306, or the common screw hole 305 and the vertical screw hole 307) by two hexagonal head bolts passing through the limit block mounting hole 504.

[0128] It should be noted that, for the present invention, as shown in FIG3 , when the end pin flat 106 of the bolt pin blank 1-0 is processed and the tail positioning reserved end face 108-0 is required to be positioned, the limit block 5 is fixed by two hexagonal head bolts respectively threadedly connected to the common screw hole 305 and the horizontal screw hole 306;

[0129] As shown in FIG. 4 , when the end pin flat 106 of the bolt pin blank 1-0 is processed and the end face 102 is positioned by the head, the limit block 5 is fixed by two hexagonal head bolts respectively threadedly connected to the common screw hole 305 and the vertical screw hole 307.

[0130] In a specific implementation, the distance H from the limiting surface 502 to the platform bottom 505 is greater than the transverse length L′ of the pin flat 106 .

[0131] Furthermore, the distance H from the limiting surface 502 to the platform bottom 505 is about 10 mm greater than the length L′ of the pin flat 106 , so that it will not interfere with the tool chuck during processing.

[0132] In a specific implementation, the thickness d of the positioning bent rod 501 is smaller than the thickness d′ of the pin flat 106 .

[0133] Furthermore, the thickness d of the positioning bent rod 501 is 1 mm smaller than the thickness d′ of the pin flat 106 , so that the milling cutter of the machine tool can be avoided and the milling cutter is prevented from processing the positioning bent rod 501 during processing.

[0134] In order to more clearly understand the technical solution of the utility model, the working process of the utility model is described below.

[0135] 1. For a bolt pin blank 1-0 to be processed with a pin flat 106, when it is positioned by the tail positioning reserved end face 108-0 (the pin flat 106 starts from the tail positioning reserved end face 108-0 and extends to the distance L' between the tail positioning reserved end face 108-0), the operation mode adopted by the device of the utility model is as follows:

[0136] First, fix the limit block 5 in the common screw hole 305 and the horizontal screw hole 306. At this time, the positioning bent rod 501 of the limit block 3 is horizontally centered and horizontally placed on the front side of the V-shaped positioning groove 304.

[0137] Then, the bolt pin blank 1-0 to be processed is inserted from the rear end to the front into the V-shaped positioning groove 304 of the positioning block 3, the tail positioning reserved end surface 108-0 is against the limiting surface 502 on the rear side of the positioning bent rod 501, and the shaft center 103 of the bolt pin blank 1-0 is against the two V-shaped positioning surfaces of the V-shaped positioning groove 304;

[0138] Then, the clamping pin 7 is rotated downward to drive the inclined pressure plate 4 to move downward until the clamping inclined surface 405 at the lower right side of the inclined pressure plate 4 abuts against the circumferential surface of the shaft 103, completing the clamping and positioning operation of the workpiece to be processed in the device;

[0139] Finally, start the horizontal milling machine and use the face milling cutter to perform milling on the front and rear sides of the anti-stripping blank end 105-0 of the workpiece to be processed in batches to obtain the pin flats 106 on the front and rear sides, that is, to obtain a bolt pin blank 1-0 that has completed the pin flat processing.

[0140] The initial position of the milling cutter is positioned at the workpiece tail positioning surface (i.e., the tail positioning reserved end surface 108-0), and the horizontal milling machine is started to perform milling along the axial direction of the bolt pin (specifically, Figure 3a As shown, the bolt pin blank 1-0 with the pin flattened is obtained by moving from front to back until the distance from the workpiece tail positioning surface (i.e., the tail positioning reserved end surface 108-0) is L'. Figure 3b shown.

[0141] Second, for a bolt pin blank 1-0 to be processed with a pin flat 106, when it is positioned by the head positioning end face 102 (the pin flat 106 starts from the distance L between the head positioning end face 102 and extends to the tail end), and when it is positioned by the tail positioning reserved end face 108-0 (the pin flat 106 starts from the tail positioning reserved end face 108-0 and extends to the distance L′ between the tail positioning reserved end face 108-0), the operation mode adopted by the device of the utility model is as follows:

[0142] First, fix the limit block 5 in the common screw hole 305 and the vertical screw hole 307, and the positioning bent rod 501 of the limit block 3 is perpendicular to the horizontal plane;

[0143] Then, the bolt pin blank 1-0 to be processed is inserted from the rear end to the front into the V-shaped positioning groove 304 of the positioning block 3, and the head positioning end face 102 of the bolt pin blank 1-0 to be processed is stuck at the V-shaped stop face 311 on the rear side of the V-shaped positioning groove 304 for tightening and positioning;

[0144] Then, the clamping pin 7 is rotated downward to drive the inclined pressure plate 4 to move downward until the clamping inclined surface 405 at the lower right side of the inclined pressure plate 4 abuts against the circumferential surface of the shaft 103, and the workpiece to be processed is fixed between the V-shaped positioning groove 304 and the clamping inclined surface 405, completing the clamping and positioning operation of the workpiece to be processed in the device;

[0145] Finally, start the horizontal milling machine and use the face milling cutter to perform milling on the front and rear sides of the anti-stripping blank end 105-0 of the workpiece to be processed in batches to obtain the pin flats 106 on the front and rear sides, that is, to obtain a bolt pin blank 1-0 that has completed the pin flat processing.

[0146] The initial position of the milling cutter is positioned at a position L away from the workpiece head positioning surface (i.e., the head positioning end surface 102), and the horizontal milling machine is started to perform milling along the axial direction of the bolt pin (specifically, Figure 4a As shown, the bolt pin blank 1-0 with the pin flattened is obtained by moving from the back to the front until the tail end of the workpiece is processed. Figure 4b , Figure 7b shown.

[0147] It should be noted that in order to obtain the finished bolt pin 1, it needs to be processed to form a threaded shaft 104, and the processing operation of the threaded shaft 104 is performed by other mature processing procedures and processing devices in the prior art. The present utility model does not involve the processing of the threaded shaft, which will not be repeated here.

[0148] Compared with the prior art, the end pin flattening processing and positioning device of the bolt pin provided by the utility model has the following beneficial effects:

[0149] 1. The device provided by the utility model is suitable for bolt pins with different shaft diameters D. It adopts a V-shaped structure with a transverse opening for positioning, and can control the axis of the workpiece at the same height, so that the tail of the workpiece (i.e., the bolt pin blank) is positioned by sharing the same limit block;

[0150] 2. The utility model has strong versatility. By loosening a hexagonal bolt, the limit block can be rotated 90 degrees, so that the limit block does not affect the smooth rod shaft and the anti-slip blank end on the bolt pin blank to extend forward, so that the workpiece (i.e., the bolt pin blank) can be positioned from the head through the V-shaped stop surface 311 on the rear side of the V-shaped positioning groove 304, and then the pin flattening processing can be further performed thereon;

[0151] 3. By applying the utility model, the problem of pin flattening processing of bolt pins of different specifications and different positioning bases is solved. The utility model is convenient and quick to operate, makes the processing accuracy of the workpiece accurate and reliable, and significantly improves the processing efficiency of the workpiece.

[0152] 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 protection scope of the present invention.

Claims

1. A bolt pin end flattening processing and positioning device, characterized in that: It comprises a bottom plate (2), a positioning block (3), an inclined pressure plate (4), a cover plate (6), a pressing nail (7) and a pin (8); Wherein, a positioning block (3) is vertically arranged in the longitudinal middle of the top of the bottom plate (2); A cover plate (6) distributed horizontally in a transverse direction is fixedly arranged on the top of the positioning block (3); A clamping nail (7) is vertically penetrated through the cover plate (6); The pressing pin (7) is threadedly connected to the cover plate (6); The lower end of the pressing pin (7) is pivotally connected to the top of a vertically distributed inclined pressure plate (4); The oblique pressure plate (4) is located inside the positioning block (3); The inclined pressure plate (4) is used to press and position the bolt pin blank (1-0) to be processed and placed inside the positioning block (3).

2. The bolt pin end flattening processing and positioning device according to claim 1, characterized in that: A press platform (203) is disposed laterally on both sides of the upper plane of the bottom plate (2); The bottom plate (2) is placed horizontally on an external workbench; A positioning groove (201) is provided in the longitudinal middle of the bottom plate (2) and runs through in the transverse direction; A positioning block mounting hole (202) is respectively provided at the left and right ends of the positioning groove (201); The two positioning block mounting holes (202) are symmetrically distributed on the left and right.

3. The bolt pin end flattening processing and positioning device according to claim 1, characterized in that: The bottom of the positioning block (3) is provided with a bottom threaded hole (301) at a position corresponding to each positioning block mounting hole (202) on the bottom plate (2); The positioning block (3) is fixed in the positioning groove (201) of the base plate (2) by means of two first hexagon socket screws; After the first hexagon socket screw passes through the positioning block mounting hole (202) on the bottom plate (2) from bottom to top, it is threadedly fixedly connected with the bottom threaded hole (301) on the positioning block (3).

4. The bolt pin end flattening processing and positioning device according to claim 1, characterized in that: A positioning and pressing groove (302) which is open upward and passes through longitudinally is provided in the middle of the positioning block (3); The inclined pressure plate (4) is located in the positioning and pressing groove (302); The left side surface of the positioning and pressing groove (302) is a pressure-bearing surface (303); A V-shaped positioning groove (304) opening to the left is provided at the lower right side of the positioning and pressing groove (302); An inclined pressure plate slideway (308) is provided on the right side of the positioning and pressing groove (302) of the positioning block (3); The inclined pressure plate slideway (308) is located above the V-shaped positioning groove (304); A V-shaped stop surface (311) is provided on the rear side of the positioning block (3).

5. The bolt pin end flattening processing and positioning device according to claim 4, characterized in that: A common screw hole (305) and a transverse screw hole (306) are provided on the front right end of the positioning block (3); The center points of the common screw hole (305) and the transverse screw hole (306) are located on the same horizontal straight line, and are also located on the same straight line as the symmetric center line of the V-shaped positioning groove (304); The positioning block (2) is provided with a vertical screw hole (307) at a position directly below the common screw hole (305); The distance between the common screw hole (305) and the vertical screw hole (307) is equal to the distance between the common screw hole (305) and the horizontal screw hole (306).

6. The bolt pin end flattening processing and positioning device according to claim 4, characterized in that: A cover plate mounting platform (309) and a cover plate mounting hole (310) are respectively provided on the left and right sides of the top of the positioning block (3); The cover plate (6) is fixed to the top of the positioning block (3) by two second hexagon socket screws; The cover plate (6) is provided with a cover plate countersunk hole (601) at a position corresponding to each cover plate mounting hole (310) on the positioning block (3); After the second hexagon socket screw passes through the cover plate countersunk hole (601) from top to bottom, it is threadedly fixedly connected with the cover plate mounting hole (310) on the positioning block (3); The lower end surface of the cover plate (6) is provided with a cover plate slot (602); A slot protrusion (6020) is respectively provided at the left and right ends of the cover plate slot (602); The two slot protrusions (6020) are arranged opposite to the two cover plate mounting platforms (309) at the top of the positioning block (3); The slot projection (6020) is located in the cover plate mounting platform (309).

7. The bolt pin end flattening processing and positioning device according to claim 1, characterized in that: A pressing nail (7) is vertically penetrated through the left end of the cover plate (6); The clamping pin (7) is threadedly connected to the clamping pin threaded hole (603) on the cover plate (6); The lower end of the pressing nail (7) has a cylindrical end (701); A top opening for a clamping pin through-hole (401) is provided at the top of the inclined pressure plate (4) at a position exactly corresponding to the columnar end (701); The circumferential outer wall of the columnar end (701) is circumferentially provided with an arc-shaped groove (702); The inclined pressure plate (4) is provided with two pin holes (402) extending longitudinally therethrough; The pin hole (402) passes longitudinally through the pressing pin penetration hole (401); The cylindrical end (701) is vertically inserted into the pressing pin penetration hole (401); A pin (8) is inserted through each pin hole (402); The middle sections of the two pins (8) are located on the left and right sides of the arc-shaped groove (702) of the columnar end (701) placed in the pressing pin penetration hole (401).

8. The bolt pin end flattening processing and positioning device according to claim 1, characterized in that: A left straight surface (403) is provided on the left side of the inclined pressure plate (4); The left straight surface (403) contacts the pressure-bearing surface (303) on the positioning block (3); An inclined pressure plate groove (404) is provided on the upper right side of the inclined pressure plate (4); The inclined pressure plate groove (404) is slidably matched with the inclined pressure plate slideway (308) on the positioning block (3); A pressing inclined surface (405) is provided at the lower right side of the inclined pressure plate (4) for pressing and positioning the bolt pin blank (1-0) to be processed and placed inside the positioning block (3).

9. The end flattening processing and positioning device for a bolt pin according to any one of claims 1 to 8, characterized in that: A limiting block (5) is arranged at the front side of the right end of the positioning block (3); The limiting block (5) is used to limit the tail positioning reserved end face (108-0) on the bolt pin blank (1-0) when the processing requirement of the end pin flat (106) of the bolt pin blank (1-0) is to position the tail positioning reserved end face (108-0).

10. The bolt pin end flattening processing and positioning device according to claim 9, characterized in that: A positioning bent rod (501) is provided on the left side of the limiting block (5); A limiting surface (502) is provided on the rear side of the positioning bent rod (501). A limit block mounting platform (503) is provided on the right side of the limit block (5); The rear side surface of the limit block mounting platform (503) is the platform bottom (505); The limit block mounting platform (503) is provided with two limit block mounting holes (504) which are symmetrically distributed on the left and right sides; The two limit block mounting holes (504) are respectively arranged corresponding to the common screw hole (305) and the horizontal screw hole (306) on the front right end of the positioning block (3); The limit block (5) is fixed on the positioning block (3) by two hexagonal bolts; The distance H from the limiting surface (502) to the platform bottom (505) is greater than the transverse length L' of the pin flat (106); The thickness d of the positioning bent rod (501) is smaller than the thickness d' of the pin flat (106).

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