A machining auxiliary positioning device for a locking block

Abstract

The present invention discloses a processing auxiliary positioning device for a lock block, comprising a base plate; two horizontal rows of boss assemblies are provided on the top of the base plate; each horizontal row of boss assemblies includes a plurality of bosses; a lock block blank is placed on the top surface of each boss; each boss is connected to the lock block blank via a first positioning shaft; a second positioning shaft is provided on the left or right side of each boss for abutting against a reserved sliding end surface of the lock block blank; a main pressure plate is provided on one side of each boss on the base plate; the main pressure plate is tightly connected to the base plate and presses the top surface of one end of the lock block blank; the lock block blanks placed on the tops of two adjacent bosses are in tight contact with the bottom surfaces of both ends of the open pressure plate. The present invention can position the complex end side surface of the lock block in steps through a set of devices, and assist the machine tool in step-by-step processing and post-forming, without the need to perform multiple positioning and multiple processing through multiple positioning devices as in the prior art to obtain the formed complex end side surface, thereby saving the manufacturing cost of the device and saving time and effort.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to a machining auxiliary positioning device for a locking block. Background Art

[0002] See also Figure 1a As shown, the lock block 9 is the core component of the switch machine that drives the action rod to move and controls its action to lock and unlock;

[0003] The locking block 9 is a block-shaped workpiece with parallel upper and lower end faces and a height of H. The outer side surface of its left end has a semicircular end face 901, the outer side surface of its right end has a fan-shaped end face 906, the central area has a transition end face 903 and a locking end face 904, and the front and rear sides of its right end have sliding end faces 905.

[0004] The locking block 9 has a fan-shaped end surface 906 on the right side. The key parts that affect its movement are: a circular hole 902 on the left side that is concentric with the semicircular end surface 901, a transition end surface 903 in the middle, a locking end surface 904, and sliding end surfaces 905 on the front and rear sides of the right side.

[0005] The upper and lower end surfaces of the locking block 9 are parallel planes, and the height dimension H is easy to ensure. Processing requirements: see Figure 1b As shown, for the locking block blank 9-0 before machining, the pre-hole 907 with machining allowance corresponding to the circular hole 902 and the reserved sliding end face 908 with machining allowance corresponding to the sliding end face 905 are used as positioning references to complete the machining of the semicircular end face 901, the circular hole 902, the transition end face 903, the locking end face 904, the sliding end face 905 and the reserved machining allowance of the fan-shaped end face 906;

[0006] It should be noted that the pre-hole 907 with machining allowance on the locking block blank 9-0 is the circular hole in the blank before machining, corresponding to the circular hole 902. The reserved sliding end surfaces 908 with machining allowance on the front and rear sides of the right end of the locking block blank 9-0 are the sliding end surfaces of the blank before machining, with a finishing allowance (e.g., 1 mm finishing allowance), corresponding to the sliding end surface 905.

[0007] See also Figure 1b As shown, in order to ensure the processing accuracy of the finished locking block 9 (i.e., the live workpiece), the end side circumference and the circular hole of the locking block blank 9-0 before processing are required to be pre-processed to the live size of the finished locking block 9 (i.e., the live workpiece) with a reserved finishing allowance (e.g., 1mm finishing allowance), and its shape is similar to that of the live workpiece.

[0008] exist Figure 1bIn the illustrated locking block blank 9-0, the circular marking line A1 is the inner edge of the pre-hole 907 with machining allowance (i.e., the edge of the blank circular hole), and the circular marking line A2 is the inner edge of the circular hole 902 in the finished locking block 9 to be obtained by machining (i.e., the edge line of the live circular hole); the distance between A1 and A2 is the finishing allowance (e.g., 1 mm finishing allowance);

[0009] The marking line B1 that circles the outside of the entire locking block blank 9-0 is the outer edge with machining allowance (i.e., the outer edge of the blank). The marking line B2 that circles the entire locking block blank 9-0 and is located inward of the marking line B1 is the outer edge of the finished locking block 9 to be obtained by machining (i.e., the circumference of the finished end surface). The distance between B1 and B2 is the finishing allowance (e.g., 1mm finishing allowance).

[0010] Since the end faces and side faces on the locking block blank 9-0 are composed of multiple arc surfaces intersecting with straight surfaces, they are complex end faces and side faces. In order to process the workpiece, it is currently necessary to replace multiple positioning devices and perform multiple processing on different end faces or side faces in sequence. In addition, when replacing different positioning devices, it is necessary to disassemble the workpiece to be processed (i.e., the locking block blank), which is not only time-consuming and labor-intensive, but also seriously affects the processing accuracy of the workpiece. Summary of the Invention

[0011] The purpose of the present invention is to provide a machining auxiliary positioning device for a locking block in view of the technical defects in the prior art.

[0012] To this end, the present invention provides a machining auxiliary positioning device for a locking block, comprising a base plate, a first positioning shaft, a second positioning shaft, a main pressing plate and an opening pressing plate;

[0013] The top of the bottom plate is provided with two horizontal rows of boss assemblies;

[0014] Each horizontal row of boss combinations includes a plurality of bosses that are laterally distributed and equally spaced;

[0015] The number of bosses in the combination of the two horizontal rows of bosses is equal and symmetrically distributed front to back;

[0016] A locking block blank to be processed is placed on the top surface of each boss;

[0017] Each boss is fixedly connected to a locking block blank through a first positioning shaft;

[0018] Wherein, a second positioning shaft is respectively provided on the left side or the right side of each boss;

[0019] The second positioning shaft abuts against the reserved sliding end surface on the locking block blank;

[0020] Wherein, a main pressure plate is respectively provided above one side of the bottom plate close to the step positioning hole of each boss;

[0021] The main pressure plate is fastened to the base plate by a first screw and a first nut, and presses the top surface of one end of the locking block blank placed on the boss;

[0022] The locking block blank is located between the bottom of the main pressure plate and the top of the base plate;

[0023] The top surfaces of the locking block blanks placed on the tops of the two adjacent bosses are in tight contact with the bottom surfaces of both ends of an open pressing plate respectively.

[0024] It can be seen from the technical solution provided by the present invention above that, compared with the prior art, the present invention provides a processing auxiliary positioning device for a locking block, which is scientifically designed and can perform step-by-step positioning of the complex end side surfaces (including end faces and side surfaces) on the locking block blank through a set of devices, and assist the machine tool in performing step-by-step processing to obtain the formed complex end side surfaces (that is, the finished locking block). There is no need to perform multiple positioning and multiple processing through multiple positioning devices as in the prior art to obtain the formed complex end side surfaces, which significantly saves the manufacturing cost of the device and saves time and effort.

[0025] By applying the present invention, in conjunction with an existing machine tool located outside, the complex end side surfaces on the locking block blank can be processed step by step without disassembling the workpiece and only requiring the pressure plate to be replaced once, thereby effectively ensuring the processing accuracy of the workpiece.

[0026] By applying the present invention, the existing problem that the complex end side surfaces on the locking block blank need to be processed in multiple sequences and cannot be processed into shape in one time is effectively solved. The device has a scientific structure, is easy and quick to operate, and can clamp multiple locking block blanks to be processed at one time, effectively reducing the labor intensity of workers and improving the processing quality of workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1a This is a schematic diagram of the three-dimensional structure of the finished locking block;

[0028] Figure 1b It is a schematic diagram of the three-dimensional structure of the locking block blank to be processed;

[0029] Figure 2 A schematic diagram of the three-dimensional structure of the auxiliary positioning device for machining a locking block provided by the present invention, when performing the first stage machining operation on a locking block blank in an embodiment (omitting the clamping part on the machine tool);

[0030] Figure 3 A top view of the machining auxiliary positioning device for a locking block provided by the present invention, when a first stage machining operation is performed on a locking block blank in an embodiment;

[0031] Figure 4 This is a left side view of the machining auxiliary positioning device for a locking block provided by the present invention, during the first stage machining operation of a locking block blank in an embodiment;

[0032] Figure 5 A schematic diagram of the three-dimensional structure of the auxiliary positioning device for machining a locking block provided by the present invention, when performing the second stage machining operation on a locking block blank in an embodiment (omitting the clamping part on the machine tool);

[0033] Figure 6 A schematic diagram of the three-dimensional structure of the bottom plate in the machining auxiliary positioning device for the locking block provided by the present invention;

[0034] Figure 7 A schematic diagram of the three-dimensional structure of the base plate of the machining auxiliary positioning device for the locking block provided by the present invention when viewed from the bottom;

[0035] Figure 8 A schematic structural diagram of the first positioning shaft in the machining auxiliary positioning device for the locking block provided by the present invention;

[0036] Figure 9 A view of the second positioning axis in the machining auxiliary positioning device for the locking block provided by the present invention;

[0037] Figure 10 A schematic structural diagram of an L-shaped main pressure plate in the machining auxiliary positioning device for a locking block provided by the present invention;

[0038] Figure 11 A schematic structural diagram of the opening pressure plate in the machining auxiliary positioning device for the locking block provided by the present invention;

[0039] Figure 12a Schematic diagram 1 of the structure of the first screw (a T-shaped screw) in the machining auxiliary positioning device for the locking block provided by the present invention;

[0040] Figure 12b The structure diagram of the first screw (T-type screw) in the machining auxiliary positioning device of the lock block provided by the present invention is as follows: Figure 2 ;

[0041] Figure 13a Schematic diagram 1 of the structure of the second screw in the machining auxiliary positioning device for the locking block provided by the present invention;

[0042] Figure 13b In the machining auxiliary positioning device for the locking block provided by the present invention, the structure of the second screw is schematically shown as follows: Figure 2 ;

[0043] Figure 14 A schematic structural diagram of a hexagonal nut in the machining auxiliary positioning device for a locking block provided by the present invention;

[0044] In the figure, 1. bottom plate, 2. first positioning shaft, 3. second positioning shaft, 4. main pressure plate, 5. opening pressure plate;

[0045] 6. First screw, 7. Second screw, 701. Second nut, 8. First nut;

[0046] 9. Locking block, 9-0. Locking block blank; 901. Semicircular end face, 902. Round hole, 903. Transition end face, 904. Locking end face, 905. Sliding end face;

[0047] 906. Sector end face, 907. Pre-hole, 908. Reserved sliding end face;

[0048] 101. First pressing platform, 102. First U-shaped opening, 103. Boss, 104. Step positioning hole, 105. Second positioning shaft positioning hole;

[0049] 106. Second screw mounting hole, 107. Horizontal oblong groove, 108. Vertical oblong hole, 109. First U-shaped groove, 110. Horizontal oblong hole;

[0050] 111. Second U-shaped groove, 201. Large handle, 202. Main positioning axis;

[0051] 301. Small handle, 302. Secondary positioning shaft, 303. Bottom plate plug shaft;

[0052] 401. arc surface of pressing plate, 402. arc surface of workpiece pressing, 403. screw hole;

[0053] 501. Second U-shaped opening, 502. Large chamfered portion, 503. Arc platform, 504. Second pressing platform;

[0054] 601. Cylindrical nut, 602. First flat, 603. Threaded end;

[0055] 701. Small cylindrical nut, 702. Second flat 703. Tighten the thread. DETAILED DESCRIPTION

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0057] 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 to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0058] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0059] 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 the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0060] See also Figures 2 to 10 、 Figure 12a 、 Figure 12b 、 Figure 13a 、 Figure 13b and Figure 14 , the present invention provides a machining auxiliary positioning device for a locking block, comprising a base plate 1, a first positioning shaft 2, a second positioning shaft 3, a main pressing plate 4 and an opening pressing plate 5;

[0061] The top of the bottom plate 1 is provided with two horizontal rows of boss assemblies;

[0062] Each horizontal row of boss combinations includes multiple bosses 103 (not limited to four) distributed laterally and at equal intervals;

[0063] The number of bosses 103 in the two horizontal rows of bosses is equal and symmetrically distributed front to back;

[0064] A locking block blank 9-0 to be processed is placed on the top surface of each boss 103;

[0065] The shape and size of the boss 103 correspond to the shape and size of the locking block blank 9-0;

[0066] It should be noted that eight bosses 103 are provided in the middle of the base plate 1 in two rows and four columns in mirror distribution. The shape of the bosses 103 is similar to that of the workpiece but is slightly smaller by 2 mm. They are used to place the locking block blank 9 - 0 to be processed.

[0067] In the present invention, in a specific implementation, a pressing platform 101 is respectively provided at the four corners of the bottom plate 1;

[0068] The press platform 101 is used for fixed connection with the machine tool located outside;

[0069] In specific implementation, a first U-shaped opening 102 is provided in the middle of the press platform 101 and is distributed laterally;

[0070] In a specific implementation, the press table 101 is fixedly connected to the workbench 3000 of the machine tool located outside by a third bolt 2000 (a T-bolt) and a third nut 1000;

[0071] The workbench 3000 of the machine tool is provided with an opening slot at a position corresponding to the first U-shaped opening 102;

[0072] After the third bolt 2000 passes through the opening slot and the first U-shaped opening 102 from bottom to top, the upper end of the third bolt 2000 is threadedly fixedly connected to the third nut 1000.

[0073] In the present invention, in a specific implementation, each boss 103 is fixedly connected to a locking block blank 9-0 via a first positioning shaft 2;

[0074] In specific implementation, each boss 103 is provided with a vertically penetrating stepped positioning hole 104 at a position corresponding to the pre-hole 907 on the locking block blank 9-0;

[0075] The first positioning shaft 2 passes through the pre-hole 907 on the locking block blank 9 - 0 from top to bottom and is inserted into the step positioning hole 104 .

[0076] For specific implementation, see Figure 8 As shown, the first positioning shaft 2 is a two-step shaft, the upper part of which is a large handle 201, and the lower part is a main positioning shaft 202 that matches the size of the pre-hole 907 on the locking block blank 9-0;

[0077] In a specific implementation, the diameter of the upper end opening of the stepped positioning hole 104 is larger than the diameter of the pre-hole 907 on the locking block blank 9-0, for example, 1 mm larger, so as to facilitate the cutter to be allowed to move when machining the blank circular hole 902-0;

[0078] The diameter of the lower opening of the stepped positioning hole 104 is the same as the diameter of the pre-hole 907 on the locking block blank 9-0 (the diameter of the pre-hole 907 is equal to the diameter of the main positioning shaft 202 at the lower part of the first positioning shaft 2).

[0079] In the present invention, in a specific implementation, a second positioning shaft 3 is provided on the left or right side of each boss 103;

[0080] The second positioning shaft 3 (specifically, the secondary positioning shaft 302 ) abuts against (ie, is in tight contact with) the reserved sliding end surface 908 on the locking block blank 9 - 0 ;

[0081] In specific implementation, a second positioning shaft positioning hole 105 is provided on the left or right side of each boss 103 at a position corresponding to and tangent to the reserved sliding end surface 908 on the locking block blank 9-0;

[0082] The second positioning shaft 3 (specifically, the bottom plate plugging shaft 303 ) is plugged into the second positioning shaft positioning hole 105 .

[0083] For specific implementation, see Figure 9 As shown, the second positioning shaft 3 is a three-step shaft, the upper part of which is a small handle 301, the middle part is a secondary positioning shaft 302 for positioning the reserved sliding end face 908 on the locking block blank 9-0, and the lower part is a base plate plug shaft 303 that matches the size of the second positioning shaft positioning hole 105 (that is, the diameter of the base plate plug shaft 303 is equal to the diameter of the second positioning shaft positioning hole 105).

[0084] In the present invention, in a specific implementation, the base plate 1 is provided with a main pressure plate 4 above one side of the step positioning hole 104 close to each boss 103;

[0085] The main pressure plate 4 is fastened to the base plate 1 by means of the first screw 6 and the first nut 8, and presses the top surface of one end of the locking block blank 9-0 placed on the boss 103;

[0086] The locking block blank 9-0 is located between the bottom of the main pressure plate 4 and the top of the base plate 1;

[0087] For specific implementation, see Figure 10 As shown, the main pressure plate 4 is in an L-shape.

[0088] In specific implementation, a pressing plate arc surface 401 is provided at the bottom of one end of the main pressing plate 4 and protrudes downward;

[0089] The arc surface 401 of the pressing plate is used to abut against (ie, be in close contact with) the top surface of the bottom plate 1;

[0090] The bottom of the other end of the main pressing plate 4 is provided with a workpiece pressing arc surface 402 protruding downward;

[0091] The workpiece pressing arc surface 402 is used to press the top surface of the locking block blank 9-0 to be processed;

[0092] In specific implementation, a vertically penetrating screw hole 403 is provided at the center of the main pressure plate 4;

[0093] The screw hole 403 is used to pass the first screw 6 through.

[0094] For specific implementation, see Figure 6 As shown, at the front and rear ends of the bottom plate 1, a vertically penetrating longitudinal oblong hole 108 is provided at a position close to the step positioning hole 104 of each boss 103;

[0095] See also Figure 7 As shown, a first U-shaped groove 109 is provided at the bottom of the base plate 1 at a position corresponding to each longitudinal oblong hole 108;

[0096] The open end of the first U-shaped groove 109 is located on the front side or the rear side of the bottom plate 1 adjacent to the longitudinal oblong hole 108;

[0097] In order to fix the main pressure plate 4 and the base plate 1, the first screw 6 passes through the first U-shaped groove 109, the longitudinal oblong hole 108 and the screw hole 403 of the main pressure plate 4 from bottom to top, and its upper end is threadedly fixed with the first nut 8.

[0098] In the present invention, in a specific implementation, for each horizontal row of boss combinations, a main pressure plate 4 is provided on the left side of the boss 103 on the far left and on the right side of the boss on the far right.

[0099] The main pressure plate 4 is fastened to the base plate 1 by a first screw 6 and a first nut, and presses the top surface of one end of the locking block blank 9-0 placed on the boss 103;

[0100] The locking block blank 9 - 0 is located between the bottom of the main pressure plate 4 and the top of the base plate 1 .

[0101] For specific implementation, see Figure 6 As shown, the bottom plate 1 is provided with a transverse oblong hole 110 on the left and right sides of each transverse row of boss combinations;

[0102] The bottom of the base plate 1 is provided with a second U-shaped groove 111 at a position corresponding to each transverse oblong hole 110;

[0103] The opening end of the second U-shaped groove 111 is located on the left side or right side of the bottom plate 1 adjacent to the transverse oblong hole 110;

[0104] The first screw 6 passes through the second U-shaped groove 111, the transverse oblong hole 110 and the screw hole 403 of the main pressure plate 4 from bottom to top, and its upper end is screwed and fixedly connected with the first nut 8;

[0105] In the present invention, the specific implementation is as follows: Figure 12a 、 Figure 12b As shown, the lower end of the first screw 6 has a cylindrical nut 601;

[0106] The cylindrical nut 601 is provided with a front-to-back symmetrical first flat 602;

[0107] The upper portion of the first screw 6 is provided with a threaded end 603;

[0108] Furthermore, the distance between the two first flats 602 is smaller than the transverse width of the first U-shaped groove 109 and the longitudinal width of the second U-shaped groove 111, specifically, both are slightly smaller by 1 mm.

[0109] In the present invention, the specific implementation is as follows: Figure 2 、 Figure 11 The top surfaces of the locking block blanks 9-0 placed on the tops of the two adjacent bosses 103 are in close contact with the bottom surfaces of both ends of an opening pressure plate 5 respectively;

[0110] In specific implementation, the opening pressure plate 5 is connected to the bottom plate 1 through the second screw 7;

[0111] A second U-shaped opening 501 is provided in the middle of the opening pressure plate 5;

[0112] For specific implementation, see Figure 6 As shown, the bottom plate 1 is provided with a second screw mounting hole 106 that passes vertically between any two adjacent bosses 103; for example, Figure 6 There are ten second screw mounting holes 106 provided between the eight bosses 103 shown;

[0113] See also Figure 7 As shown, the bottom of the base plate 1 is provided with a transverse oblong groove 107 at a position corresponding to each second screw mounting hole 106;

[0114] The second screw mounting hole 106 is located at the center of the transverse oblong groove 107;

[0115] The second screw 7 passes through the transverse oblong groove 107 , the second screw mounting hole 106 and the second U-shaped opening in the middle of the open pressing plate 5 in sequence from bottom to top, and is then threadedly fixedly connected with a second nut 701 .

[0116] For specific implementation, see Figure 2 、 Figure 11 As shown, large chamfered portions 502 are provided on both sides of the opening end of the second U-shaped opening 501 in the middle of the opening pressure plate 5;

[0117] In a specific implementation, the opening pressure plate 5 is provided with an arc platform 503 on the side opposite to the second U-shaped opening 501 , so as to compensate for the weakening of the opening pressure plate 5 by the second U-shaped opening 501 .

[0118] In specific implementation, a pressing platform 504 is provided on both sides of the bottom of the opening pressing plate 5 so as to protrude downwards;

[0119] In the present invention, the specific implementation is as follows: Figure 13a 、 Figure 13b As shown, the lower end of the second screw 7 has a small cylindrical nut 701;

[0120] The small cylindrical nut 701 is provided with a second flat 702 which is symmetrical in front and back;

[0121] A tightening thread 703 is provided on the upper portion of the second screw 7 .

[0122] Furthermore, the distance between the two second flats 702 is smaller than the longitudinal width of the transverse oblong groove 107 , for example, slightly smaller by 1 mm.

[0123] In the present invention, in a specific implementation, the base plate 1 is a square plate-like workpiece;

[0124] The press platform 101 is used to be fixedly connected to an external machine tool (for example, via a third bolt 2000 ).

[0125] In the present invention, in a specific implementation, the first screw 6 and the second screw 7 are both T-shaped screws.

[0126] In order to more clearly understand the technical solution of the present invention, the working principle of the present invention is described below in conjunction with a specific embodiment. Specifically, the following operation sequence is included:

[0127] See also Figures 2 to 4 , the first stage processing operations are as follows:

[0128] First, insert multiple (e.g., 12) first screws 6 from the back of the base plate 1 through the corresponding longitudinal oblong holes 108 and transverse oblong holes 110 on the inner, outer, upper, and lower sides. Then, insert the L-shaped main pressure plate 4 onto the first screws 6 through the screw holes 403 thereon. Then, screw the first nuts 8 onto the threaded ends 603 of the first screws 6.

[0129] Then, a plurality of (e.g., 11) second screws 7 are respectively inserted from the back of the base plate 1 through the transverse oblong grooves 107 and out of the upper plane of the base plate 1 through the second screw mounting holes 106, and the second nuts 701 are installed on the tightening threads 703 of the second screws 7;

[0130] Then, the fixture is aligned and a universal clamping device (e.g., a clamping plate or a third bolt 2000 and a third nut 2000 that match the T-shaped slot of the machine tool's workbench) is used to secure the fixture of the present invention to the machine tool's workbench through the first U-shaped openings 102 on the clamping platform 101 at the four corners of the base plate 1. At this point, the fixture of the present invention is completely secured to the machine tool.

[0131] Then, a plurality of (for example, 8) workpieces to be processed (i.e., locking block blanks 9-0) are placed horizontally on the bosses 103, and a plurality of (for example, 8) first positioning shafts 2 are respectively passed through the pre-holes 907 on one locking block blank 9-0, and then passed through the stepped positioning holes 104 of the base plate 1 for positioning. Then, a plurality of (for example, 8) second positioning shafts 3 are passed through the second positioning shaft positioning holes 105, and the workpiece to be processed (i.e., locking block blank 9-0) is rotated counterclockwise around the first positioning shaft 2, so that the workpiece to be processed (i.e., locking block blank 9-0) is abutted against the secondary positioning shaft 302 in the second positioning shaft 3. At this time, the positioning of the workpiece is completed.

[0132] Then, adjust the four L-shaped main pressure plates 4 on the left and right sides of the device so that they are placed horizontally and the pressing arc surface 402 of the main pressure plate 4 is against the upper surface of the workpiece to be processed, that is, the locking block blank 9-0), tighten the first nut 8 at the end of the T-shaped first screw 6, and lift one by one the six T-shaped second screws 7 in two rows and three columns at the same horizontal axis position as the four L-shaped main pressure plates 4, and clamp the six open pressure plates 5 onto the T-shaped second screws 7 through the second U-shaped openings thereon, and place them in the gap between the second nut 701 at the upper end of the second screw 7 and the workpiece to be processed;

[0133] Then, adjust the open pressing plate 5 to place it horizontally so that the second pressing platform 504 on the open pressing plate 5 abuts against the upper plane of the workpiece to be processed, and tighten the second nut 701 on the upper end of the second T-shaped screw 7;

[0134] The two rows of eight L-shaped main pressure plates 4 on the front and rear sides of the device of the present invention are not used in this sequence. They are adjusted to the outermost position of the device through the longitudinal oblong holes 108 and placed horizontally to avoid collision with the tool on the machine tool during processing. The four second screws 7 with second nuts 701 in the middle row of the device are not used in this sequence. They fall on the upper surface of the base plate 1 under the action of gravity;

[0135] At this time, the eight first positioning axes 2 and the eight second positioning axes 3 are removed, and the machine tool is started. The semicircular end face 901, the circular hole 902 and the sector end face 906 of the workpiece to be processed can be processed in the first stage by using the tool on the machine tool (such as a stick milling cutter);

[0136] The second stage processing operations are as follows:

[0137] See also Figure 5 After the first step of processing is completed, adjust the two rows of eight main pressure plates 4 on the front and rear sides of the top of the bottom plate 1 of the device of the present invention so that they are placed longitudinally, and the pressing arc surface 402 of the main pressure plate 4 is against the upper surface of the workpiece to be processed. Tighten the first nut 8 at the end of the first screw 6, and lift the four main pressure plates 4 placed horizontally in the center of the device of the present invention one by one. Then, the four open pressure plates 5 are clamped onto the second screw 7 through the second U-shaped openings on them, and are placed in the gap between the second nut 701 at the end of the second screw 7 and the top of the workpiece to be processed;

[0138] Then, adjust the open pressing plate 5 to place it longitudinally so that the second pressing platform 504 of the open pressing plate 5 abuts against the upper plane of the workpiece to be processed, and tighten the second nut 701 at the end of the second screw 7;

[0139] Then, loosen the four L-shaped main pressure plates 4 on the left and right sides of the top of the bottom plate 1 and adjust them to the outermost longitudinal position of the device. Loosen the three horizontal open pressure plates 5 and remove them, so that the second screw 7 with the second nut 701 (hexagonal nut) naturally falls on the upper surface of the bottom plate 1.

[0140] At this time, the machine tool is started, and the tool on the machine tool (such as a stick milling cutter) can be used to perform the second stage of processing operations on the transition end face 903, the locking end face 904 and the sliding end face 905 of the workpiece to obtain the finished locking block 9 (i.e., the live workpiece). Figure 1a shown.

[0141] In the present invention, it should be noted that, see Figure 1b As shown, in order to ensure the processing accuracy of the finished locking block 9 (i.e., the live workpiece), the end side circumference and the circular hole of the locking block blank 9-0 before processing are required to be pre-processed to the live size of the finished locking block 9 (i.e., the live workpiece) with a reserved finishing allowance (e.g., 1mm finishing allowance), and its shape is similar to that of the live workpiece.

[0142] For the present invention, based on the lock block blank 9-0, the device provided by the present invention and the above two-stage processing operations can be completed. Figure 1b The machining allowance (e.g. 1mm machining allowance) reserved on the lock block blank 9-0 is finely machined, that is, the lock block blank 9-0 is machined to the finished size, and finally the lock block blank 9-0 is obtained. Figure 1a The finished locking block 9 shown can ensure the dimensional accuracy of the finished workpiece (i.e., the locking block 9).

[0143] To sum up, compared with the prior art, the present invention provides a processing auxiliary positioning device for a lock block, which is scientifically designed and can perform step-by-step positioning of the complex end side surfaces (including end faces and side surfaces) on the lock block blank through a set of devices, and assist the machine tool in performing step-by-step processing to obtain the formed complex end side surfaces (that is, the finished lock block). There is no need to perform multiple positioning and multiple processing through multiple positioning devices as in the prior art to obtain the formed complex end side surfaces, which significantly saves the manufacturing cost of the device and saves time and effort.

[0144] By applying the present invention, in conjunction with an existing machine tool located outside, the complex end side surfaces on the locking block blank can be processed step by step without disassembling the workpiece and only requiring the pressure plate to be replaced once, thereby effectively ensuring the processing accuracy of the workpiece.

[0145] By applying the present invention, the existing problem that the complex end side surfaces on the locking block blank need to be processed in multiple sequences and cannot be processed into shape in one time is effectively solved. The device has a scientific structure, is easy and quick to operate, and can clamp multiple locking block blanks to be processed at one time, effectively reducing the labor intensity of workers and improving the processing quality of workpieces.

[0146] 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 principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A machining auxiliary positioning device for a locking block, characterized in that: It comprises a bottom plate (1), a first positioning shaft (2), a second positioning shaft (3), a main pressure plate (4) and an opening pressure plate (5); The top of the bottom plate (1) is provided with two horizontal rows of boss assemblies; Each horizontal row of boss combinations includes a plurality of bosses (103) that are laterally distributed and equally spaced; The number of bosses (103) in the combination of the two horizontal rows of bosses is equal and symmetrically distributed front to back; A locking block blank (9-0) to be processed is placed on the top surface of each boss (103); Each boss (103) is fixedly connected to a locking block blank (9-0) via a first positioning shaft (2); Wherein, a second positioning shaft (3) is respectively provided on the left side or the right side of each boss (103); The second positioning shaft (3) abuts against a reserved sliding end surface (908) on the locking block blank (9-0); Wherein, the bottom plate (1) is provided with a main pressure plate (4) above one side of the step positioning hole (104) close to each boss (103); The main pressure plate (4) is fastened to the base plate (1) via a first screw (6) and a first nut (8), and presses the top surface of one end of the locking block blank (9-0) placed on the boss (103); A locking block blank (9-0) is located between the bottom of the main pressure plate (4) and the top of the base plate (1); The top surfaces of the locking block blanks (9-0) placed on the tops of the two adjacent bosses (103) are in close contact with the bottom surfaces of both ends of an open pressing plate (5). Each boss (103) is provided with a vertically penetrating stepped positioning hole (104) at a position corresponding to the pre-hole (907) on the locking block blank (9-0); The first positioning shaft (2) passes through the pre-hole (907) on the locking block blank (9-0) from top to bottom and is then inserted into the step positioning hole (104); The opening pressure plate (5) is connected to the bottom plate (1) via a second screw (7); A second U-shaped opening (501) is provided in the middle of the opening pressure plate (5); The bottom plate (1) is provided with a second screw mounting hole (106) extending vertically therethrough at a position between any two adjacent bosses (103); The bottom of the base plate (1) is provided with a transverse long circular groove (107) at a position corresponding to each second screw mounting hole (106); The second screw mounting hole (106) is located at the center of the transverse oblong groove (107); The second screw (7) passes through the transverse long circular groove (107), the second screw mounting hole (106) and the second U-shaped opening in the middle of the open pressure plate (5) in sequence from bottom to top, and is then threadedly fixedly connected with a second nut.

2. The machining auxiliary positioning device for the locking block according to claim 1, characterized in that: The first positioning shaft (2) is a two-step shaft, the upper portion of which is a large handle (201) and the lower portion of which is a main positioning shaft (202) that matches the size of the pre-hole (907) on the locking block blank (9-0); and / or the diameter of the upper end opening of the stepped positioning hole (104) is larger than the diameter of the pre-hole (907) on the locking block blank (9-0); The diameter of the middle and lower opening of the step positioning hole (104) is the same as the diameter of the pre-hole (907) on the locking block blank (9-0).

3. The machining auxiliary positioning device for the locking block according to claim 1, characterized in that: A second positioning shaft positioning hole (105) is provided on the left or right side of each boss (103) at a position corresponding to and tangent to the reserved sliding end surface (908) on the locking block blank (9-0); The bottom plate plug-in shaft (303) in the second positioning shaft (3) is plugged into the second positioning shaft positioning hole (105); The second positioning shaft (3) is a three-step shaft, the upper portion of which is a small handle (301), the middle portion of which is a secondary positioning shaft (302) for positioning the reserved sliding end surface (908) on the locking block blank (9-0), and the lower portion of which is a base plate plug shaft (303) that matches the size of the second positioning shaft positioning hole (105).

4. The machining auxiliary positioning device for a locking block according to claim 1, characterized in that: A pressing plate arc surface (401) is provided at the bottom of one end of the main pressing plate (4) so ​​as to protrude downward; The arc surface (401) of the pressing plate is used to abut against the top surface of the bottom plate (1); A workpiece pressing arc surface (402) is provided at the bottom of the other end of the main pressing plate (4) so ​​as to protrude downwards; The workpiece pressing arc surface (402) is used to press the top surface of the locking block blank (9-0) to be processed.

5. The machining auxiliary positioning device for the locking block according to claim 4, characterized in that: A vertically penetrating screw hole (403) is provided at the center of the main pressure plate (4); A vertically penetrating longitudinal oblong hole (108) is provided at the front and rear ends of the bottom plate (1), near the step positioning hole (104) of each boss (103); A first U-shaped groove (109) is provided at the bottom of the base plate (1) at a position corresponding to each longitudinal oblong hole (108); The open end of the first U-shaped groove (109) is located on the front side or the rear side of the bottom plate (1) adjacent to the longitudinal oblong hole (108); After the first screw (6) passes through the first U-shaped groove (109), the longitudinal oblong hole (108) and the screw hole (403) of the main pressure plate (4) from bottom to top, its upper end is threadedly fixedly connected with the first nut (8); The lower end of the first screw (6) has a cylindrical nut (601); The cylindrical nut (601) is provided with a front-to-back symmetrical first flat (602); The upper portion of the first screw (6) is provided with a threaded end (603); Furthermore, the distance between the two first flats (602) is smaller than the transverse width of the first U-shaped groove (109) and the longitudinal width of the second U-shaped groove (111).

6. The machining auxiliary positioning device for a locking block according to claim 1, characterized in that: Large chamfered portions (502) are respectively provided on both sides of the opening end of the second U-shaped opening (501) in the middle of the opening pressure plate (5); The opening pressure plate (5) is provided with an arc platform (503) on the side opposite to the second U-shaped opening (501); The lower end of the second screw (7) has a small cylindrical nut (701); A second flat plate (702) is provided on the small cylindrical nut (701) and is symmetrical in front and back; The upper portion of the second screw (7) is provided with a tightening thread (703); The distance between the two second flats (702) is smaller than the longitudinal width of the transverse oblong groove (107).

7. The machining auxiliary positioning device for a locking block according to claim 1, characterized in that: For each horizontal row of boss combinations, a main pressure plate (4) is provided on the left side of the boss (103) on the far left and on the right side of the boss on the far right. The main pressure plate (4) is fastened to the base plate (1) via a first screw (6) and a first nut, and presses the top surface of one end of the locking block blank (9-0) placed on the boss (103); The locking block blank (9-0) is located between the bottom of the main pressing plate (4) and the top of the base plate (1).

8. The machining auxiliary positioning device for a locking block according to claim 7, characterized in that: The bottom plate (1) is provided with a transverse oblong hole (110) on the left and right sides of each transverse row of boss combinations; A second U-shaped groove (111) is provided at the bottom of the base plate (1) at a position corresponding to each transverse oblong hole (110); The opening end of the second U-shaped groove (111) is located on the left side or right side of the bottom plate (1) adjacent to the transverse oblong hole (110); After the first screw (6) passes through the second U-shaped groove (111), the transverse oblong hole (110) and the screw hole (403) of the main pressure plate (4) in sequence from bottom to top, its upper end is threadedly fixedly connected to the first nut (8).

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