Machining method for locking angle pin with parallelogram-shaped cross section

Abstract

The invention discloses a machining method for a locking angle pin with a parallelogram-shaped cross section. The machining method comprises the following steps that S1, a first blank is milled into a locking pin blank with a rectangular cross section; s2, the locking pin blank is fixed to a milling machine workbench in a first inclined posture, the first end of the locking pin blank is milled, when the locking pin blank is in the first inclined posture, a first inclined angle is formed between the width direction of the locking pin blank and the milling machine workbench, and the first end of the locking pin blank is the end, away from the milling machine workbench, of the locking pin blank; the locking pin blank is fixed to the milling machine workbench in a first inclined posture in the opposite direction, the second end of the locking pin blank is milled to be flat, the locking pin with the parallelogram-shaped cross section is obtained, and the second end of the locking pin blank is the other end, away from the milling machine workbench, of the locking pin blank; s3, the locking pin is subjected to heat treatment; and S4, the first end face, obtained after heat treatment, of the locking pin is ground into an inclined face in the length direction, the locking angle pin is obtained, and the first end face of the locking pin is the end face, in the thickness direction, of the locking pin.

Description

Technical Field

[0001] The invention relates to the technical field of air hammers, and in particular to a processing method for a locking oblique pin with a parallelogram cross section. Background Art

[0002] In the air hammer, the equipment for rolling the head before drawing aluminum tube products, the upper rolling head is installed on the main shaft of the air hammer through a dovetail structure, and the locking oblique pin with a parallelogram cross section is used to connect and lock the main shaft of the air hammer and the upper rolling head. When the main shaft of the air hammer drives the upper rolling head to reciprocate up and down, the size of the dovetail groove of the main shaft of the air hammer and the dovetail of the upper rolling head changes due to wear, and the size of the locking oblique pin also needs to be adjusted accordingly, which means it needs to be reprocessed, and it is a consumable part.

[0003] The current process steps for locking oblique pin processing are as follows:

[0004] 1. According to the maximum shape of the locking oblique pin and the clamping position required for the subsequent process, the blank is processed by a common milling machine;

[0005] 2. Then quench and temper by heat treatment to the hardness requirement;

[0006] 3. Grind the blank to size and demagnetize it using a surface grinder;

[0007] 4. Then, the outer shape and inclined surface of the locking oblique pin with a parallelogram cross section are processed by wire cutting.

[0008] It can be seen that the current processing time of the locking bevel pin is long, the processing efficiency is low, and the processing cost is high. Summary of the invention

[0009] In view of this, the present invention provides a machining method for a locking oblique pin with a parallelogram cross-section, which can help improve the machining efficiency of the locking oblique pin and reduce the machining cost of the locking oblique pin.

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A method for processing a locking oblique pin with a parallelogram cross section, comprising the following steps:

[0012] S1. Milling the first blank into a locking pin blank with a rectangular cross section; wherein the first blank is a 45# steel part;

[0013] S2. Fix the locking pin blank on the milling machine table in a first tilted posture and mill the first end of the locking pin blank, wherein the width direction of the locking pin blank forms a first tilt angle with the milling machine table when the locking pin blank is in the first tilted posture, and the first end of the locking pin blank is the end of the locking pin blank away from the milling machine table; then fix the locking pin blank on the milling machine table in the opposite direction in the first tilted posture and mill the second end of the locking pin blank to obtain a locking pin with a parallelogram cross section, wherein the second end of the locking pin blank is the other end of the locking pin blank away from the milling machine table;

[0014] S3, heat treating the locking pin;

[0015] S4. Grind the first end face of the locking pin after heat treatment into an inclined face along the length direction to obtain a locking inclined pin, wherein the first end face of the locking pin is an end face of the locking pin along the thickness direction.

[0016] Preferably, in step S1, the length dimension of the locking pin blank is the length dimension of the locking oblique pin, the width dimension of the locking pin blank has a first margin, and the thickness dimension of the locking pin blank has a second margin.

[0017] Preferably, in step S2, the milling allowance of the first end of the locking pin blank is half of the first allowance, and the milling allowance of the second end of the locking pin blank is the other half of the first allowance, so that the width dimension of the obtained locking pin is the width dimension of the locking oblique pin.

[0018] Preferably, in step S2, fixing the locking pin blank on the milling machine table in a first inclined posture comprises:

[0019] Fixing the locking pin blank on the milling machine table in a first tilted posture by a clamp;

[0020] Fixing the locking pin blank in the reverse direction in a first tilted posture on the milling machine table includes:

[0021] The locking pin blank is fixed on the milling machine table in the reverse direction in a first tilted posture by a clamp.

[0022] Preferably, the method of fixing the locking pin blank on the milling machine table in a first inclined posture by a clamp comprises:

[0023] First, the locking pin blank in a first inclined posture is clamped by a first clamp block and a second clamp block, and then the first clamp block and the second clamp block are clamped and fixed by a vise on a milling machine workbench; wherein the end surface of the first clamp block used to fit with the locking pin blank is a first inclined surface, and the end surface of the second clamp block used to fit with the locking pin blank is a second inclined surface, the second inclined surface is parallel to the first inclined surface, and the inclination angle of one of the two is equal to the first inclination angle;

[0024] The method of fixing the locking pin blank in a first tilted posture in the opposite direction on the milling machine workbench by a fixture comprises:

[0025] Firstly, the locking pin blank in the opposite direction and in the first inclined posture is clamped by the first clamp block and the second clamp block, and then the first clamp block and the second clamp block are clamped and fixed by the vise on the milling machine workbench.

[0026] Preferably, before step S1, the method further includes:

[0027] S0. Firstly, the second blank is milled into a long strip-shaped fixture block semi-finished product, and then the fixture block semi-finished product is cut at a first inclination angle to obtain a first fixture block and a second fixture block; wherein the second blank is a 45# steel part.

[0028] Preferably, step S3 comprises:

[0029] The locking pin is heat treated so that the hardness value of the locking pin reaches HRC35-40.

[0030] Preferably, the step S4 comprises:

[0031] S41, placing the heat-treated locking pin flat on a grinding table of a surface grinder, wherein the first end surface of the locking pin faces upward and is consistent with the grinding direction of the grinding wheel of the surface grinder;

[0032] S42, raising one end of the locking pin along the length direction; wherein the raised height of the end of the locking pin is equal to the second margin;

[0033] S43, fixing the two ends of the locking pin along the length direction;

[0034] S44. Grind the first end face of the locking pin along the length direction by a surface grinder to obtain a locking bevel pin; wherein the grinding amount of the first end face of the locking pin is equal to the second excess.

[0035] Preferably, the step S42 includes:

[0036] One end of the locking pin along the length direction is raised by a block gauge, wherein the thickness of the block gauge is equal to the second margin.

[0037] Preferably, the step S43 includes:

[0038] The two ends of the locking pin along the length direction are blocked one by one by two blocks, so that the two ends of the locking pin along the length direction are fixed.

[0039] It can be seen from the above technical scheme that the processing method of the locking bevel pin with a parallelogram cross-section provided by the present invention adopts mechanical processing to process the locking bevel pin with a parallelogram cross-section, which can replace the original processing method mainly based on electric cutting. Moreover, this mechanical processing method is simpler and easier than the original processing method, which can help to improve the processing efficiency of the locking bevel pin and reduce the processing cost of the locking bevel pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A flow chart of a method for processing a locking oblique pin having a parallelogram-shaped cross section provided in an embodiment of the present invention;

[0042] Figure 2 A schematic structural diagram of a locking pin blank provided in an embodiment of the present invention;

[0043] Figure 3 A schematic structural diagram of a semi-finished fixture block provided in an embodiment of the present invention;

[0044] Figure 4 A schematic structural diagram of a first fixture block and a second fixture block provided in an embodiment of the present invention;

[0045] Figure 5 A schematic diagram of a first clamp block and a second clamp block clamping a locking pin provided by an embodiment of the present invention;

[0046] Figure 6 A schematic diagram of two blocks blocking a locking pin provided by an embodiment of the present invention;

[0047] Figure 7 A structural front view of a locking oblique pin provided in an embodiment of the present invention;

[0048] Figure 8 The left side view of the structure of the locking oblique pin provided by the embodiment of the present invention;

[0049] Fig. 9 A top view of the structure of the locking oblique pin provided in an embodiment of the present invention.

[0050] Among them, 1 is a locking pin, 2 is a locking bevel pin, 21 is a bevel, 3 is a first fixture block, 31 is a first bevel, 4 is a second fixture block, 41 is a second bevel, 5 is a grinding machine workbench, 6 is a block gauge, and 7 is a stopper. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] The embodiment of the present invention provides a method for processing a locking oblique pin having a parallelogram cross section, such as Figure 1 As shown, the following steps are included:

[0053] S1. Milling the first blank into a locking pin blank with a rectangular cross section; wherein the first blank is a 45# steel part;

[0054] S2. Fix the locking pin blank on the milling machine table in a first tilted posture and mill the first end of the locking pin blank, wherein the width direction of the locking pin blank forms a first tilt angle with the milling machine table when the locking pin blank is in the first tilted posture, and the first end of the locking pin blank is the end of the locking pin blank away from the milling machine table; then fix the locking pin blank on the milling machine table in the opposite direction in the first tilted posture and mill the second end of the locking pin blank to obtain a locking pin 1 with a parallelogram cross section, wherein the second end of the locking pin blank is the other end of the locking pin blank away from the milling machine table;

[0055] S3, heat treating the locking pin 1;

[0056] S4. Grind the first end face of the locking pin 1 after heat treatment into an inclined surface 21 along the length direction to obtain the locking inclined pin 2, wherein the first end face of the locking pin 1 is an end face of the locking pin 1 along the thickness direction.

[0057] It should be noted that in step S1, the first blank (45# steel piece) is actually milled to obtain the maximum shape of the locking oblique pin 2; the cross section of the locking pin blank can be a preset rectangle; Figure 2 As shown, the width dimension of the locking pin blank has a margin, so that the first end and the second end of the locking pin blank are milled flat in step S2 to obtain the locking pin 1 with a parallelogram cross section; the thickness dimension of the locking pin blank has a margin, so that the first end face of the locking pin 1 is ground into a bevel 21 along the length direction in step S4 to obtain the locking oblique pin 2; the length dimension of the locking pin blank can be directly processed in place, that is, the length dimension of the locking pin blank can be equal to the length dimension of the locking oblique pin 2, and details can be seen in the following description;

[0058] In step S2, the locking pin blank can be first fixed on the milling machine table in a first inclined posture and the first end of the locking pin blank can be milled flat; wherein, when the locking pin blank is in the first inclined posture, the first inclination angle between the width direction and the milling machine table can be 83°, that is, the first angle between the width direction of the locking pin blank and the milling machine table can be 83°, and at this time, the first end of the locking pin blank is the end of the locking pin blank away from the milling machine table (such as the upper end), and then the first end of the locking pin blank is milled flat by the milling machine (the first end of the locking pin blank is milled away along the length direction); then the locking pin blank is fixed on the milling machine table in the opposite direction in the first inclined posture and the second end of the locking pin blank is milled flat; wherein, at this time, the second end of the locking pin blank is the other end of the locking pin blank away from the milling machine table (such as the upper end, of course, at this time The first end of the locking pin blank is used as the lower end), and then the second end of the locking pin blank is milled flat by a milling machine (the second end of the locking pin blank is milled off along the length direction), and then a locking pin 1 with a parallelogram cross section is obtained; of course, the locking pin blank can be fixed on the milling machine workbench in a first tilted posture by a fixture, and the locking pin blank can be fixed on the milling machine workbench in the opposite direction in the first tilted posture by a fixture; that is, in this step, the locking pin blank with a rectangular cross section is fixed on the milling machine workbench in a first tilted posture, and the first end of the locking pin blank is milled flat (milled flat) by the milling machine, and then the locking pin blank is fixed on the milling machine workbench in the opposite direction in the first tilted posture, and the second end of the locking pin blank is milled flat (milled flat) by the milling machine, so that it is easier to obtain a locking pin 1 with a parallelogram cross section;

[0059] In step S3, the locking pin 1 is heat treated so that the locking pin 1 meets the required hardness requirement;

[0060] In step S4, the heat-treated locking pin 1 can be first placed flat on the grinding table 5 of the grinding machine, wherein the first end surface (i.e., the upper end surface) of the locking pin 1 is distributed upward, and the first end surface of the locking pin 1 is one end surface of the locking pin 1 along the thickness direction, and the first end surface of the locking pin 1 is the entire upper end surface of the locking pin 1 when it is placed flat on the grinding table 5 of the grinding machine, and then one end of the locking pin 1 along the length direction is raised and fixed, and then the first end surface of the locking pin 1 is ground flat along the length direction by the grinding machine, so that the first end surface (i.e., the upper end surface) of the locking pin 1 forms an inclined surface 21 (such as Figure 6 As shown), a locking bevel pin 2 is obtained; wherein the inclined surface 21 of the locking bevel pin 2 has a locking effect.

[0061] That is to say, the present solution provides a processing method for a locking bevel pin with a parallelogram cross-section, which uses mechanical processing to process the locking bevel pin with a parallelogram cross-section, which can replace the original processing method that uses electric cutting as the main method. Moreover, this mechanical processing method is simpler and easier than the original processing method, which can help improve the processing efficiency of the locking bevel pin and reduce the processing cost of the locking bevel pin.

[0062] In this solution, in step S1, the length dimension of the locking pin blank is the length dimension of the locking oblique pin 2, the width dimension of the locking pin blank has a first margin, and the thickness dimension of the locking pin blank has a second margin.

[0063] It should be noted that, as mentioned above, the length dimension of the locking pin blank can be processed in place, and the width dimension and thickness dimension are both left with margins; Figure 2 As shown, the size of the locking pin blank can be 21x45x150mm; wherein, the length dimension of the locking pin blank can be 150mm, and the width dimension (40mm) of the locking pin blank can have a margin of 5mm, that is, the first margin can be 5mm, and is evenly distributed on both sides of the width direction of the locking pin blank, such as a margin of 2.5mm on one side of the width direction of the locking pin blank and a margin of 2.5mm on the other side, and a thickness dimension (20mm) of the locking pin blank can have a margin of 1mm, that is, the second margin can be 1mm.

[0064] Specifically, in step S2, the milling allowance of the first end of the locking pin blank is half of the first allowance, and the milling allowance of the second end of the locking pin blank is the other half of the first allowance, so that the width dimension of the obtained locking pin 1 is the width dimension of the locking bevel pin 2.

[0065] It should be noted that the milling allowance of the first end of the locking pin blank is half of the first allowance; wherein, the milling allowance of the first end of the locking pin blank can refer to Figure 2 As shown, that is, the milling area of ​​the first end of the locking pin blank can be a right-angled triangle area (such as Figure 2 The right-angled triangle grid area above the middle), and the size of the short right-angled side of the right-angled triangle area is half (2.5mm) of the first margin (5mm), so that the first end of the locking pin blank can be a bevel, that is, as the first narrow end face of the locking pin 1;

[0066] The milling allowance of the second end of the locking pin blank can be referred to Figure 2 As shown, the milling area of ​​the second end of the locking pin blank can also be a right-angled triangle area (such as Figure 2The right-angled triangle grid area below the middle), and the size of the short right-angled side of the right-angled triangle area is the other half (2.5mm) of the first margin (5mm). In this way, the second end of the locking pin blank can be an inclined surface, that is, as the second narrow end surface of the locking pin 1, and the locking pin 1 with a parallelogram cross section can be obtained (such as Figure 5 As shown), of course, the width dimension of the locking pin 1 is the width dimension of the locking oblique pin 2.

[0067] Further, in the step S2, fixing the locking pin blank on the milling machine table in a first inclined posture includes:

[0068] Fixing the locking pin blank on the milling machine table in a first tilted posture by a clamp;

[0069] Fixing the locking pin blank in the reverse direction in a first tilted posture on the milling machine table includes:

[0070] The locking pin blank is fixed on the milling machine table in the reverse direction in a first tilted posture by a clamp.

[0071] It should be noted that the locking pin blank in a first inclined posture can be fixed on the milling machine worktable by a clamp; and the locking pin blank in the opposite direction in the first inclined posture can be fixed on the milling machine worktable by a clamp. In this way, the stability of the locking pin blank fixed at an angle on the milling machine worktable is ensured, avoiding displacement of the locking pin blank during milling operation.

[0072] Further, the method of fixing the locking pin blank on the milling machine table in a first inclined posture by a clamp includes:

[0073] like Figure 5 As shown, the locking pin blank in the first tilted posture is first clamped by the first clamp block 3 and the second clamp block 4, and then the first clamp block 3 and the second clamp block 4 are clamped and fixed by the vise on the milling machine workbench; wherein, as Figure 4 As shown, the end surface of the first fixture block 3 used to fit with the locking pin blank is a first inclined surface 31, and the end surface of the second fixture block 4 used to fit with the locking pin blank is a second inclined surface 41, the second inclined surface 41 is parallel to the first inclined surface 31, and the inclination angle of one of the two is equal to the first inclination angle;

[0074] The method of fixing the locking pin blank in a first tilted posture in the opposite direction on the milling machine workbench by a fixture comprises:

[0075] First, the locking pin blank in the opposite direction and in the first inclined posture is clamped by the first clamp block 3 and the second clamp block 4, and then the first clamp block 3 and the second clamp block 4 are clamped and fixed by the vise on the milling machine workbench.

[0076] It should be noted that if Figure 5 As shown, the locking pin blank in the first tilted posture is first clamped by the first clamp block 3 and the second clamp block 4. At this time, the first tilt angle between the locking pin blank and the milling machine table can be 83°. Then, the first clamp block 3 and the second clamp block 4 are clamped and fixed by the vise on the milling machine table. In this way, the locking pin blank can be tilted and fixed on the milling machine table in the first posture more firmly. Figure 4 As shown, the first fixture block 3 has a first inclined surface 31 for fitting with the locking pin blank, and the second fixture block 4 has a second inclined surface 41 for fitting with the locking pin blank. The first inclined surface 31 of the first fixture block 3 is parallel to the second inclined surface 41 of the second fixture block 4, and the inclination angle of the first inclined surface 31 or the second inclined surface 41 is equal to the first inclination angle, so that the first inclined surface 31 of the first fixture block 3 and the second inclined surface 41 of the second fixture block 4 can fit and clamp the locking pin blank (two end surfaces along the thickness direction) in the first inclined posture.

[0077] In addition, the locking pin blank in the first tilted posture in the opposite direction is first clamped by the first clamp block 3 and the second clamp block 4. At this time, the first tilt angle between the locking pin blank and the milling machine table can still be 83°, and then the first clamp block 3 and the second clamp block 4 are clamped and fixed by the vise on the milling machine table, so that the locking pin blank can be more firmly fixed in the first tilted posture in the opposite direction on the milling machine table, thereby making the tilting and fixing of the locking pin blank on the milling machine table more convenient and stable. Of course, by adjusting the inclination of the first inclined surface 31 and the second inclined surface 41, the processing of locking oblique pins with different inclinations can also be achieved, and by processing locking pin blanks of different lengths, small batch processing of locking oblique pins of different lengths and different inclinations can also be achieved.

[0078] In this solution, before step S1, the following steps are also included:

[0079] S0. Firstly, the second blank is milled into a long strip-shaped fixture block semi-finished product, and then the fixture block semi-finished product is cut at a first inclination angle to obtain a first fixture block 3 and a second fixture block 4; wherein the second blank is a 45# steel part.

[0080] It should be noted that the second blank can be a 45# blank steel material that has been heat treated and tempered, and then the blank steel material is milled into a long strip steel material with six faces perpendicular to each other and a size of 100x52x35 (such as Figure 3 As shown), a long strip of fixture blocks is obtained, and then the long strip of steel is cut at a first inclination angle by wire cutting to obtain a first fixture block 3 and a second fixture block 4 (as shown Figure 4 As shown); Of course, the processing method of the first clamp block 3 and the second clamp block 4 is simple and easy, and the structural form of the two is also convenient for clamping the vise on the milling machine workbench, ensuring that the vise on the milling machine workbench can clamp the two clamp blocks.

[0081] Specifically, step S3 includes:

[0082] The locking pin 1 is heat treated so that the hardness value of the locking pin 1 is in the range of HRC35-40, thereby ensuring that the locking pin meets the required hardness requirement.

[0083] Furthermore, the step S4 comprises:

[0084] S41, placing the heat-treated locking pin 1 flat on the grinding table 5 of the surface grinder; wherein the first end surface of the locking pin 1 (i.e. Figure 5 The left side of the locking pin 1 shown in the figure is distributed upward and is consistent with the grinding direction of the grinding wheel of the surface grinder;

[0085] S42, raising one end of the locking pin 1 along the length direction; wherein the raised height of the end of the locking pin 1 is equal to the second margin;

[0086] S43, fixing the two ends of the locking pin 1 along the length direction;

[0087] S44. Grind the first end surface of the locking pin 1 along the length direction by a surface grinder to obtain the locking bevel pin 2; wherein the grinding amount of the first end surface of the locking pin 1 is equal to the second excess.

[0088] It should be noted that if Figure 6 As shown, in step S41, the first end surface of the locking pin 1 is the upper end surface of the locking pin 1 (i.e. Figure 5 The left side of the locking pin 1 shown in the figure); in step S42, the left end of the locking pin 1 can be raised, and the height of the raising can be 1mm; in step S43, the two ends of the locking pin 1 along the length direction can be fixed by a blocking component to ensure that the two ends of the locking pin 1 along the length direction occupy the position on the grinding machine workbench 5 to avoid the displacement of the locking pin 1 during the grinding operation; in step S44, the first end face of the locking pin 1 is ground along the length direction by a surface grinder to obtain a locking oblique pin 2; wherein the grinding amount of the first end face of the locking pin 1 can be 1mm; in addition, as mentioned above, the thickness dimension of the locking pin blank can be 21mm, and the first end face of the locking pin 1 can be ground after being ground, such as Figure 6 As shown, the locking pin 1 has one end of 20 mm and the other end of 19 mm along the length direction, and the first end surface of the locking pin 1 forms an inclined surface 21 (ie, as shown in FIG. Figure 8 The left side of the locking oblique pin 2 shown in FIG. Figure 8 As shown, the end of the locking oblique pin 2 facing the outside of the screen (the thickness of this end is 19mm) is the small end, and the other end facing the inside of the screen (the thickness of this end is 20mm) is the large end); of course, the wear allowance of the first end surface of the locking pin 1 can be referred to Figure 6 shown.

[0089] That is to say, the heat-treated locking pin 1 is first placed flat on the grinding table 5 of the surface grinder, and then one end of the locking pin 1 along the length direction is raised, and the two ends of the locking pin 1 along the length direction are fixed, and then the first end face of the locking pin 1 is ground flat along the length direction by the surface grinder to form the required bevel 21 on the first end face of the locking pin 1. In other words, the required bevel 21 of the locking pin in the length locking direction is ground out by the surface grinder. This method of forming the required bevel on the specified end face of the locking pin 1 is simple and easy.

[0090] Furthermore, the step S42 includes:

[0091] like Figure 6 As shown, one end of the locking pin 1 along the length direction is raised by the block gauge 6, wherein the thickness of the block gauge 6 is equal to the second margin, that is, the thickness of the block gauge 6 can be 1 mm.

[0092] In this solution, step S43 includes:

[0093] like Figure 6 As shown, two blocks 7 are used to block the two ends of the locking pin 1 along the length direction, so that the two ends of the locking pin 1 along the length direction are fixed. Among them, the two blocks 7 are the blocking components mentioned above, that is, the two blocks 7 are used to block the two ends of the locking pin 1 along the length direction, so that the surface grinder can be used to grind the upper end surface of the locking pin 1 (i.e., Figure 5 The left side of the locking pin 1 shown in FIG. 1 is ground to produce the required inclined surface 21. In other words, the method of raising one end of the locking pin 1 along the length direction and the method of blocking the two ends of the locking pin 1 along the length direction are simple in design, which can make the processing method of the locking oblique pin with a parallelogram cross section more simple. Of course, the two blocks 7 can be set on the grinding machine workbench 5.

[0094] In addition, it should be noted that Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 The dimensions in include, but are not limited to, the current values.

[0095] The present invention is further described below in conjunction with specific embodiments:

[0096] The machining process of the locking bevel pin is as follows (with Figures 7 to 9 The locking bevel pin shown is used as an example):

[0097] 1. Processing of the fixture block: Prepare a 45# blank steel that has been heat-treated and tempered (i.e., the second blank mentioned above), and mill the blank steel into six long strips of steel with perpendicular faces and dimensions of 100x52x35 (such as Figure 3 As shown), the long steel strip is then processed by electric cutting into two substantially identical fixture blocks with one side inclined at 7° for standby use, that is, a first fixture block and a second fixture block (as shown) are obtained. Figure 4 shown);

[0098] 2. Mill the first blank (45# steel) to produce the maximum shape of the locking bevel pin: 21x45x150mm (such as Figure 2 As shown), the length dimension (150mm) is processed in place, the thickness dimension (20mm) has a 1mm margin (because it is a wear-prone surface, the grinding processing dimension can be adjusted according to actual needs after heat treatment), and the width dimension (40mm) has a 5mm processing margin (as shown Figure 2 (as indicated by dimension 45);

[0099] 3. If Figure 5 As shown, the two sides of the tight bevel pin blank are clamped by the first clamp block 3 and the second clamp block 4 that have been processed, and then the first clamp block 3 and the second clamp block 4 are clamped by the vise fixed on the milling machine workbench, and the processing amount of 5mm reserved at both ends of the width dimension is milled off (such as Figure 2 );

[0100] 4. Heat treatment: Heat treatment to hardness value HRC35-40;

[0101] 5. Use a surface grinder to grind out the required inclined surface size of the locking pin 1 in the length locking direction: use a 1mm thick block gauge to pad one end of the locking pin length, and then use two blocks to block the two ends of the locking pin 1 length one by one, and on the upper end surface of the locking pin 1 (i.e. Figure 5 The left side of the locking pin 1 shown in the figure) is ground into the required bevel (such as Figure 6 shown);

[0102] 6. Finally, the fitter will trim the slope shape of the locking bevel pin at both ends and the rounded corners R5 of the four edges in the length direction (such as Figures 7 to 9 as shown).

[0103] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0104] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for processing a locking oblique pin with a parallelogram cross section, characterized in that: The steps include: S1. Milling the first blank into a locking pin blank with a rectangular cross section; wherein the first blank is a 45# steel part; S2, fixing the locking pin blank on the milling machine worktable in a first tilted posture and milling the first end of the locking pin blank, wherein the width direction of the locking pin blank forms a first tilt angle with the milling machine worktable when the locking pin blank is in the first tilted posture, and the first end of the locking pin blank is the end of the locking pin blank away from the milling machine worktable; then fixing the locking pin blank on the milling machine worktable in the opposite direction in the first tilted posture and milling the second end of the locking pin blank, to obtain a locking pin (1) with a parallelogram cross section, wherein the second end of the locking pin blank is the other end of the locking pin blank away from the milling machine worktable; S3, heat treating the locking pin (1); S4. Grind the first end face of the locking pin (1) after the heat treatment into an inclined face (21) along the length direction to obtain a locking inclined pin (2), wherein the first end face of the locking pin (1) is an end face of the locking pin (1) along the thickness direction.

2. The method for processing a locking oblique pin having a parallelogram cross section according to claim 1, characterized in that: In step S1, the length dimension of the locking pin blank is the length dimension of the locking oblique pin (2), the width dimension of the locking pin blank has a first margin, and the thickness dimension of the locking pin blank has a second margin.

3. The method for processing a locking oblique pin having a parallelogram cross section according to claim 2, characterized in that: In step S2, the milling allowance of the first end of the locking pin blank is half of the first allowance, and the milling allowance of the second end of the locking pin blank is the other half of the first allowance, so that the width dimension of the obtained locking pin (1) is the width dimension of the locking oblique pin (2).

4. The method for processing a locking oblique pin having a parallelogram cross section according to claim 1, characterized in that: In the step S2, fixing the locking pin blank on the milling machine table in a first inclined posture includes: Fixing the locking pin blank on the milling machine table in a first tilted posture by a clamp; Fixing the locking pin blank in the reverse direction in a first tilted posture on the milling machine table includes: The locking pin blank is fixed on the milling machine workbench in the reverse direction in a first tilted posture by a clamp.

5. The method for processing a locking oblique pin having a parallelogram cross section according to claim 4, characterized in that: The method of fixing the locking pin blank on the milling machine table in a first inclined posture by a fixture comprises: First, the locking pin blank in a first inclined posture is clamped by a first clamp block (3) and a second clamp block (4), and then the first clamp block (3) and the second clamp block (4) are clamped and fixed by a vise on a milling machine workbench; wherein the end surface of the first clamp block (3) used to fit with the locking pin blank is a first inclined surface (31), and the end surface of the second clamp block (4) used to fit with the locking pin blank is a second inclined surface (41), the second inclined surface (41) is parallel to the first inclined surface (31), and the inclination angle of one of the two is equal to the first inclination angle; The method of fixing the locking pin blank in a first tilted posture in the opposite direction on the milling machine workbench by a fixture comprises: First, the locking pin blank in the opposite direction and in a first inclined posture is clamped by a first clamp block (3) and a second clamp block (4), and then the first clamp block (3) and the second clamp block (4) are clamped and fixed by a vise on a milling machine workbench.

6. The method for processing a locking oblique pin having a parallelogram cross section according to claim 5, characterized in that: Before step S1, the method further includes: S0. First, the second blank is milled into a long strip-shaped fixture block semi-finished product, and then the fixture block semi-finished product is cut at a first inclination angle to obtain a first fixture block (3) and a second fixture block (4); wherein the second blank is a 45# steel part.

7. The method for processing a locking oblique pin having a parallelogram cross section according to claim 1, characterized in that: The step S3 comprises: The locking pin (1) is heat treated so that the hardness value of the locking pin (1) reaches HRC35-40.

8. The method for processing a locking oblique pin having a parallelogram cross section according to claim 2, characterized in that: The step S4 comprises: S41, placing the heat-treated locking pin (1) flat on a grinding table (5) of a surface grinder, wherein the first end face of the locking pin (1) faces upward and is consistent with the grinding direction of the grinding wheel of the surface grinder; S42, raising one end of the locking pin (1) along the length direction; wherein the height of the raised end of the locking pin (1) is equal to the second margin; S43, fixing the locking pin (1) at both ends along the length direction; S44. Grind the first end face of the locking pin (1) along the length direction by a surface grinder to obtain a locking bevel pin (2); wherein the grinding amount of the first end face of the locking pin (1) is equal to the second excess.

9. The method for processing a locking oblique pin having a parallelogram cross section according to claim 8, characterized in that: The step S42 comprises: One end of the locking pin (1) along the length direction is raised by a block gauge (6); wherein the thickness of the block gauge (6) is equal to the second margin.

10. The method for processing a locking oblique pin having a parallelogram cross section according to claim 8, characterized in that: The step S43 comprises: The two ends of the locking pin (1) along the length direction are blocked one by one by two blocks (7), so that the two ends of the locking pin (1) along the length direction are fixed.

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