A machining clamp for a bearing seat and a machining method thereof

Abstract

The application discloses a machining clamp of a bearing seat and a machining method thereof and belongs to the technical field of bearing seat machining. The machining clamp comprises a die mounting seat, a plurality of groups of first clamps for clamping workpieces so as to facilitate machining of one side surface of the workpieces are installed on the die mounting seat. The first clamps comprise a lower expansion assembly, a lower positioning assembly, a pressing assembly and a first guide assembly. The lower expansion assembly is installed on the die mounting seat, and the lower positioning assembly, the pressing assembly and the first guide assembly are all installed on the lower expansion assembly. A plurality of groups of second clamps for clamping workpieces so as to facilitate machining of the other side surface of the workpieces are installed on the die mounting seat. In the above manner, when a machining center is used to replace a lathe to machine the part, the inner and outer circle center deviations of the blank can be corrected, the position degree of the part is very stable, and therefore the problem that the machining precision is restricted by the precision of the blank due to the fact that the center of the outer circle of the blank can only be copied in the lathe machining is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bearing seat machining, in particular to a bearing seat machining clamp and a bearing seat machining method. BACKGROUND

[0002] The bearing seat is used for installing the bearings of the two ends of the engine throttle shaft. Therefore, the bearing seat has two front and rear ends for supporting the throttle shaft. In order to ensure that the throttle shaft assembly has a relatively ideal movement precision after installation and does not generate additional idle torque, the concentricity between the installation positioning outer circle of the bearing seat and the inner throttle bearing hole should be within φ0.05, and the center distance between each installation hole and the center coordinate reference should be controlled within ±0.1. The traditional process is to group three numerical control lathes, and the process is as follows: clamping the outer circle to roughen the reference plane, supporting the inner hole to turn each outer circle and groove based on the reference plane, clamping the outer circle to finish machining the reference plane and the inner hole system based on the outer plane.

[0003] The most important problem encountered in the above process is that the center coordinate size of the installation hole and the bearing hole after machining is out of tolerance. The reason is that the installation hole is formed during pressure casting, while the reference plane and the inner and outer circles are machined. The insufficient machining precision of the reference plane leads to the out-of-tolerance of the installation hole coordinate. Because of the influence of the mold closing precision during pressure casting, there is a certain deviation between the inner hole features formed by the convex mold end and the outer shape features formed by the concave mold end. Therefore, when clamping the outer circle formed by the convex mold end to machine the reference plane formed by the concave mold end, the blank error is introduced, which further affects the subsequent machining precision.

[0004] Based on this, the present application designs a bearing seat machining clamp and a bearing seat machining method to solve the above problems. SUMMARY

[0005] In view of the above shortcomings of the prior art, the present application provides a bearing seat machining clamp and a bearing seat machining method.

[0006] To achieve the above purpose, the present application is implemented by the following technical solutions:

[0007] A bearing seat machining clamp, comprising a mold mounting seat, a plurality of first clamps for clamping workpieces to facilitate machining of one side surface of the workpieces are installed on the mold mounting seat;

[0008] The first clamp comprises a lower expansion assembly, a lower positioning assembly, a pressing assembly and a first guide assembly; the lower expansion assembly is installed on the mold mounting seat, and the lower positioning assembly, the pressing assembly and the first guide assembly are all installed on the lower expansion assembly;

[0009] A plurality of second clamps for clamping workpieces to facilitate machining of the other side surface of the workpieces are installed on the mold mounting seat.

[0010] Further, the lower expansion assembly comprises a first oil cylinder, a first support seat, a first spring expansion sleeve, a first mounting screw and a first expansion mandrel; the first oil cylinder is fixedly connected at the bottom of the mold mounting seat, the lower end of the first expansion mandrel is fixedly connected with the output end of the upper end of the first oil cylinder through the first mounting screw, the first support seat is fixedly installed on the upper surface of the mold mounting seat, the upper end inner wall inclined surface of the first spring expansion sleeve is in contact with the top circular truncated cone side wall of the first expansion mandrel, and the lower end of the first spring expansion sleeve is fixedly connected on the lower positioning assembly; the lower end of the first support seat is inserted into the mold mounting seat, and the first expansion mandrel passes through the first support seat and the first spring expansion sleeve.

[0011] Further, the lower positioning assembly comprises a support nail, a first positioning insertion rod, a first positioning insertion rod mounting plate, a first support cylinder and a first rhombic positioning pin; the top of the first support seat is provided with the first support cylinder, and the lower end of the first spring expansion sleeve is fixedly connected in the first support cylinder; the top of the first support cylinder is fixedly connected with a plurality of groups of support nails, the support nails are in contact with the bottom of the workpiece, the top of the first support seat is fixedly connected with the first positioning insertion rod mounting plate in a symmetrical manner, the top of the first positioning insertion rod mounting plate is fixedly connected with the first positioning insertion rod, the top of the first positioning insertion rod is in contact with the bottom of the workpiece, and the first rhombic positioning pin is vertically inserted into the first support seat and the first support cylinder.

[0012] Further, the pressing assembly comprises a quick-release pressing plate, a first lower pull rod, a dust cover and a compression spring; the upper end of the first expansion mandrel is fixedly connected with the dust cover, the first lower pull rod is in sliding connection with the dust cover, the lower end of the first lower pull rod is in sliding connection in the interior of the first expansion mandrel, the compression spring is sleeved on the first lower pull rod and located in the interior of the first expansion mandrel, and the upper end of the first lower pull rod is insertedly installed with the quick-release pressing plate, and the bottom of the quick-release pressing plate is in contact with the top of the workpiece.

[0013] Further, the quick-release pressing plate is provided with a locking hole which is the same in shape as the top of the first lower pull rod.

[0014] Further, the first guide assembly comprises a first sliding rod and a first sliding groove; the first sliding rod is fixedly connected on the lower end side wall of the first expansion mandrel, and the first sliding rod is in up-down sliding connection in the first sliding groove which is formed on the lower end inner wall of the first support seat.

[0015] Further, the second clamp comprises a positioning seat, a second support seat, a second oil cylinder, a second rhombic positioning pin, a second rhombic positioning pin mounting hole, a second spring expansion sleeve, a gas detection hole, a second mounting screw and a second guide assembly; the second oil cylinder is fixedly connected at the bottom of the mold mounting seat, the second support seat is fixedly connected at the top of the mold mounting seat, the top of the second support seat is fixedly connected with the positioning seat, the output end of the upper end of the second oil cylinder is fixedly connected with the second spring expansion sleeve through the second mounting screw, the second spring expansion sleeve is located in the inside of the positioning seat, and the outer side wall of the inverted truncated cone at the top of the second spring expansion sleeve is in contact connection with the inclined surface of the inner wall at the upper end of the positioning seat, the second rhombic positioning pin is inserted into the second rhombic positioning pin mounting hole at the top of the positioning seat, and the top of the second rhombic positioning pin protrudes from the second rhombic positioning pin mounting hole.

[0016] Further, two groups of gas detection holes are formed in the inside of the side of the positioning seat, and the gas detection holes are used to communicate the positioning seat and the gas detection sensor.

[0017] Further, the second guide assembly comprises a third sliding groove and a second sliding rod; a vertical third sliding groove is formed in the middle of the second spring expansion sleeve, the second sliding rod is slidably connected in the inside of the third sliding groove, and the second sliding rod is fixedly installed on the inner wall of the positioning seat.

[0018] The application further discloses a machining method of the machining clamp of the bearing seat.

[0019] I. The workpiece is installed on the first spring expansion sleeve, the first lower pull rod is locked by rotating the quick-release pressing plate, the first oil cylinder is started, the first oil cylinder drives the first expansion mandrel to move downward under the limiting action of the first sliding groove and the first sliding rod through the first mounting screw, the first expansion mandrel extrudes the inclined surface of the inner wall at the upper end of the first spring expansion sleeve outward through the top inverted truncated cone side wall, the side wall of the first spring expansion sleeve is scattered along the fracture line formed therein, so that the outer wall of the first spring expansion sleeve is in close contact with the inner wall of the workpiece, the workpiece is clamped and fixed, the machining of the surface of one side of the workpiece is performed, after the machining is completed, the first lower pull rod is loosened by rotating the quick-release pressing plate, and the workpiece is removed.

[0020] II. The workpiece is installed in the inside of the second spring expansion sleeve, the second oil cylinder is started, the second oil cylinder drives the second spring expansion sleeve to move downward under the limiting action of the third sliding groove and the second sliding rod through the second mounting screw, when the second spring expansion sleeve moves downward, the second spring expansion sleeve is shrunk inward to clamp the bearing due to the extrusion of the inclined surface of the inner wall at the upper end of the positioning seat, and the surface machining of the other side of the workpiece is performed.

[0021] III. The fitting clearance between the outer plane of the workpiece and the plane of the positioning seat is detected through the gas detection hole on the positioning seat, when the clearance is greater than a set value, the gas detection sensor sends information to the external controller, and the external controller controls to issue an alarm. Advantages

[0022] The present application shortens the process route: the first process of the original process is cancelled, and the outer circle is directly processed by using the original reference surface and the inner hole positioning, so that the error caused by the machining reference conversion between the first process and the second process of the original process can be avoided;

[0023] When the machining center is used to replace the lathe to process the part, the inner and outer circle center deviation of the blank can be corrected, so that the position degree of the part is very stable, thereby solving the problem that the machining precision is restricted by the precision of the blank due to the fact that the center of the outer circle of the blank can only be copied during the lathe processing;

[0024] Furthermore, a plurality of workpieces can be clamped at one time, and the machining efficiency can be improved by more than 50% compared with the original;

[0025] The application realizes the close contact of the outer wall of the first spring expansion sleeve and the inner wall of the workpiece, clamps and fixes the workpiece, positions and supports the workpiece through the supporting nail and the first positioning inserting rod, and radially positions the first supporting seat and the first supporting cylinder through the first rhombic positioning pin; the positioning nail can avoid the process boss left in the die casting process on the reference surface, and can select a position with relatively less casting deformation for positioning; the positioning nail, the first expansion mandrel and the first rhombic positioning pin form a one-side two-pin positioning system, and the position deviation of the blank outer circle can be corrected in processing; in order to prevent the supporting nail from not being close to the positioning plane when the first expansion mandrel is expanded, when the first oil cylinder pulls down the first expansion mandrel, the first expansion mandrel drives the dust cover to move downward, the dust cover extrudes the compression spring downward, the compression spring extrudes the first pull-down rod to move downward, and the quick-release pressing plate on the first pull-down rod presses the workpiece downward, so that the workpiece inner hole is expanded by the first expansion mandrel, the compression spring is pressed on the supporting nail, the downward pressing and radial expansion actions are realized at the same time by using one set of oil cylinder, the clamp space is saved, and the conditions for processing multiple workpieces at a time are created; at the same time, the top shape of the first pull-down rod can be irregular or similar to a triangle, the quick-release pressing plate is provided with a hole with the same shape as the top shape of the first pull-down rod, and the quick-release pressing plate can be connected or loosened with the first pull-down rod by rotating a certain angle, and the operation is more convenient and reliable than the threaded connection design; by starting the second oil cylinder, the second oil cylinder drives the second spring expansion sleeve to move downward through the second mounting screw, and when the second spring expansion sleeve moves downward, it is extruded by the inner wall inclined surface of the upper end of the positioning seat, and the second spring expansion sleeve is inwardly retracted, so as to clamp the bearing; the second spring expansion sleeve moves vertically under the limiting action of the third sliding groove and the second sliding rod; at the same time, since the radial clamping stroke of the second spring expansion sleeve is limited, in order to prevent the second spring expansion sleeve from being damaged due to clamping overstroke when there is no workpiece, the stroke of the second spring expansion sleeve is limited under the limiting action of the third sliding groove and the second sliding rod; there are two air detection holes on the positioning seat plane for detecting the fit gap between the outer plane of the workpiece and the plane of the positioning seat, and when the gap is greater than the set value, the air detection sensor sends information to the external controller, and the external controller controls to issue an alarm. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0027] Figure 1 A perspective view of a main body structure of a machining clamp for a bearing seat according to the present application Figure 1 ;

[0028] Figure 2 A perspective view of a main body structure of a machining clamp for a bearing seat according to the present application Figure 2 ;

[0029] Figure 3 A front view of a machining clamp structure for a bearing seat according to the present application

[0030] Figure 4 A right view of a machining clamp structure for a bearing seat according to the present application

[0031] Figure 5 A perspective view of a main body structure of a machining clamp for a bearing seat according to the present application Figure 3 ;

[0032] Figure 4 A perspective view of a main body structure of a machining clamp for a bearing seat according to the present application Figure 7 ;

[0033] Figure 5 A perspective view of a main body structure of a machining clamp for a bearing seat according to the present application Figure 8 ;

[0034] Figure 4 A sectional view along the A-A direction of Figure 9 ;

[0035] Figure 4 A sectional view along the B-B direction of Figures 1-9 .

[0036] The reference signs in the drawings respectively represent:

[0037] 1, mold mounting seat; 2, first clamp; 21, first oil cylinder; 22, first support seat; 23, quick-release pressing plate; 24, support nail; 25, first positioning plug; 26, first positioning plug mounting plate; 27, first pull-down rod; 28, dust cover; 29, first spring expansion sleeve; 210, first support cylinder; 211, first diamond positioning pin; 212, compression spring; 213, first mounting screw; 214, first sliding rod; 215, first expansion mandrel; 216, first sliding groove; 3, second clamp; 31, positioning seat; 32, second support seat; 33, second oil cylinder; 34, second diamond positioning pin; 35, second diamond positioning pin mounting hole; 36, second spring expansion sleeve; 37, gas detection hole; 38, second mounting screw; 39, third sliding groove; 310, second sliding rod. DETAILED DESCRIPTION

[0038] To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0039] The present application will be further described below with reference to the embodiments. EMBODIMENT

[0040] Please refer to the drawings in the description ​ A machining clamp for bearing seat, comprising a mold mounting seat 1, a plurality of groups of first clamps 2 for clamping workpieces to facilitate machining of one side surface of the workpieces are installed on the mold mounting seat 1;

[0041] The first clamps 2 comprise a lower expansion assembly, a lower positioning assembly, a pressing assembly and a first guide assembly; the lower expansion assembly is installed on the mold mounting seat 1, and the lower positioning assembly, the pressing assembly and the first guide assembly are all installed on the lower expansion assembly;

[0042] The workpiece is clamped transversely through the lower expansion assembly, the workpiece is positioned and supported through the lower positioning assembly, the workpiece is vertically pressed through the pressing assembly, and the running stability of the lower expansion assembly is ensured through the first guide assembly;

[0043] The lower inflation assembly comprises a first oil cylinder 21, a first support seat 22, a first spring inflation sleeve 29, a first mounting screw 213 and a first inflation mandrel 215; the first oil cylinder 21 is fixedly connected to the bottom of the mold mounting seat 1, the lower end of the first inflation mandrel 215 is fixedly connected to the output end of the upper end of the first oil cylinder 21 through the first mounting screw 213, the first support seat 22 is fixedly installed on the upper surface of the mold mounting seat 1, the upper end inner wall inclined surface of the first spring inflation sleeve 29 is in contact with the top inverted truncated cone side wall of the first inflation mandrel 215, and the lower end of the first spring inflation sleeve 29 is fixedly connected to the lower positioning assembly; the lower end of the first support seat 22 is inserted into the mold mounting seat 1, and the first inflation mandrel 215 passes through the first support seat 22 and the first spring inflation sleeve 29;

[0044] By starting the first oil cylinder 21, the first oil cylinder 21 drives the first inflation mandrel 215 to move downward through the first mounting screw 213, and the first inflation mandrel 215 extrudes the upper end inner wall inclined surface of the first spring inflation sleeve 29 outward through the top inverted truncated cone side wall, so that the side wall of the first spring inflation sleeve 29 is scattered along the fracture line formed therein, thereby realizing the close contact between the outer wall of the first spring inflation sleeve 29 and the inner wall of the workpiece, and clamping and fixing the workpiece;

[0045] The lower positioning assembly comprises support nails 24, first positioning insertion rods 25, first positioning insertion rod installation plates 26, a first support cylinder 210 and first rhombic positioning pins 211; the top of the first support seat 22 is provided with the first support cylinder 210, and the lower end of the first spring inflation sleeve 29 is fixedly connected to the inside of the first support cylinder 210; the top of the first support cylinder 210 is fixedly connected with a plurality of groups of support nails 24, the support nails 24 are in contact with the bottom of the workpiece, the top of the first support seat 22 is fixedly connected with the first positioning insertion rod installation plates 26 in a symmetrical manner, the top of each first positioning insertion rod installation plate 26 is fixedly connected with the first positioning insertion rod 25, the top of the first positioning insertion rod 25 is in contact with the bottom of the workpiece, and the first rhombic positioning pin 211 is vertically inserted into the first support seat 22 and the first support cylinder 210;

[0046] The workpiece is positioned and supported by the support nails 24 and the first positioning insertion rods 25, and the first support seat 22 and the first support cylinder 210 are radially positioned by the first rhombic positioning pin 211; the workpiece is positioned by the support nails 24, which can avoid the process boss left in the die casting process on the reference surface, and can select a position with relatively small casting deformation for positioning; the support nails 24, the first inflation mandrel 215 and the first rhombic positioning pin 211 form a one-side two-pin positioning system, and the position deviation of the blank outer circle can be corrected in machining by this positioning mode;

[0047] The pressing assembly comprises a quick-release pressing plate 23, a first downward pull rod 27, a dust cover 28 and a compression spring 212; the upper end of the first expansion mandrel 215 is fixedly connected with the dust cover 28, the first downward pull rod 27 is in sliding connection with the dust cover 28, the lower end of the first downward pull rod 27 is in sliding connection inside the first expansion mandrel 215, the first downward pull rod 27 is sleeved with the compression spring 212, the compression spring 212 is located inside the first expansion mandrel 215, the upper end of the first downward pull rod 27 is insertedly installed with the quick-release pressing plate 23, and the bottom of the quick-release pressing plate 23 is in contact with the top of the workpiece;

[0048] Preferably, the top of the compression spring 212 is fixedly connected with the dust cover 28, and the bottom of the compression spring 212 is fixedly connected with the first downward pull rod 27;

[0049] The quick-release pressing plate 23 is provided with a locking hole which is the same in shape as the top of the first downward pull rod 27;

[0050] In order to prevent the support nail 24 from not being tightly attached to the positioning plane when the first expansion mandrel 215 is expanded, when the first oil cylinder 21 pulls down the first expansion mandrel 215, the first expansion mandrel 215 drives the dust cover 28 to move downward, the dust cover 28 extrudes the compression spring 212 downward, the compression spring 212 extrudes the first downward pull rod 27 to move downward, and the quick-release pressing plate 23 on the first downward pull rod 27 presses the workpiece downward, so that the workpiece inner hole is expanded by the first expansion mandrel 215, the compression spring 212 has pressed the workpiece above the support nail 24, two actions of downward pressing and radial expansion are realized by using one set of oil cylinder, the jig space is saved, and the conditions for machining multiple workpieces at one time are created; meanwhile, the top of the first downward pull rod 27 can be in an irregular shape or a triangular shape, the quick-release pressing plate 23 is provided with a hole which is the same in shape as the top of the first downward pull rod 27, and the quick-release pressing plate 23 can be connected with or loosened from the first downward pull rod 27 by rotating a certain angle, which is more convenient and reliable than the threaded connection design;

[0051] The first guide assembly comprises a first sliding rod 214 and a first sliding groove 216; the lower end side wall of the first expansion mandrel 215 is fixedly connected with the first sliding rod 214, and the first sliding rod 214 is in sliding connection in the first sliding groove 216 which is formed in the lower end inner wall of the first support base 22;

[0052] In the process of moving the first expansion mandrel 215 upward and downward, the first sliding groove 216 and the first sliding rod 214 are matched to realize the guiding and limiting of the first expansion mandrel 215;

[0053] The mold mounting seat 1 is installed with a plurality of sets of second clamps 3 for clamping workpieces so as to facilitate machining of the other side surface of the workpieces;

[0054] The second clamp 3 comprises a positioning seat 31, a second support seat 32, a second oil cylinder 33, a second rhombic positioning pin 34, a second rhombic positioning pin mounting hole 35, a second spring expanding sleeve 36, a gas detection hole 37, a second mounting screw 38 and a second guide assembly; the second oil cylinder 33 is fixedly connected to the bottom of the mold mounting seat 1, the second support seat 32 is fixedly connected to the top of the mold mounting seat 1, the top of the second support seat 32 is fixedly connected with the positioning seat 31, the output end of the upper end of the second oil cylinder 33 is fixedly connected with the second spring expanding sleeve 36 through the second mounting screw 38, the second spring expanding sleeve 36 is located in the inside of the positioning seat 31, and the reverse circularly truncated cone outer side wall of the top of the second spring expanding sleeve 36 is in contact connection with the inclined surface of the inner wall of the upper end of the positioning seat 31, the second rhombic positioning pin 34 is inserted into the second rhombic positioning pin mounting hole 35 formed in the top of the positioning seat 31, and the top of the second rhombic positioning pin 34 protrudes from the second rhombic positioning pin mounting hole 35;

[0055] The inside of the side of the positioning seat 31 is provided with two groups of gas detection holes 37, and the gas detection holes 37 are used to communicate the positioning seat 31 and the gas detection sensor;

[0056] The gas detection sensor is used to detect the fitting gap between the outer plane of the workpiece and the plane of the positioning seat, when the gap is greater than the set value, the gas detection sensor sends information to the external controller, and the external controller controls to issue an alarm;

[0057] The second guide assembly comprises a third sliding groove 39 and a second sliding rod 310; the middle of the second spring expanding sleeve 36 is provided with a vertical third sliding groove 39, the inside of the third sliding groove 39 is slidably connected with the second sliding rod 310, and the second sliding rod 310 is fixedly installed on the inner wall of the positioning seat 31;

[0058] By starting the second oil cylinder 33, the second oil cylinder 33 drives the second spring expanding sleeve 36 to move downward through the second mounting screw 38, when the second spring expanding sleeve 36 moves downward, the second spring expanding sleeve 36 is inwardly shrunk due to the extrusion of the inclined surface of the inner wall of the upper end of the positioning seat 31, so as to clamp the bearing, and the second spring expanding sleeve 36 moves vertically under the limiting action of the third sliding groove 39 and the second sliding rod 310; at the same time, since the radial clamping stroke of the second spring expanding sleeve 36 is limited, in order to prevent the second spring expanding sleeve 36 from being damaged due to clamping overstroke when the workpiece is not installed, the stroke of the second spring expanding sleeve 36 is limited under the limiting action of the third sliding groove 39 and the second sliding rod 310; there are two gas detection holes on the plane of the positioning seat 31, which are used to detect the fitting gap between the outer plane of the workpiece and the plane of the positioning seat 31, when the gap is greater than the set value, the gas detection sensor sends information to the external controller, and the external controller controls to issue an alarm.

[0059] In some embodiments, the second clamp 3 further comprises an upper pressing assembly, and the output end of the lower end of the upper pressing assembly is in contact with the top of the workpiece; the upper pressing assembly can also adopt a pressing air cylinder;

[0060] The upper pressing assembly is used as an auxiliary clamping to release the workpiece after clamping to provide a space for the lower cutter.

[0061] In some embodiments, a machining method of a machining clamp of a bearing seat comprises the following steps:

[0062] I. Install the workpiece on the first spring expansion sleeve 29, rotate the quick-release pressure plate 23 to lock the first lower pull rod 27, start the first oil cylinder 21, the first oil cylinder 21 drives the first expansion mandrel 215 to move downward under the limiting action of the first sliding groove 216 and the first sliding rod 214 through the first mounting screw 213, the first expansion mandrel 215 extrudes the upper end inner wall inclined surface of the first spring expansion sleeve 29 outward through the top inverted conical side wall, so that the side wall of the first spring expansion sleeve 29 spreads along the fracture line formed therein, thereby realizing the close contact between the outer wall of the first spring expansion sleeve 29 and the inner wall of the workpiece, clamping and fixing the workpiece, and machining the surface of one side of the workpiece. After the machining is completed, rotate the quick-release pressure plate 23 to release the first lower pull rod 27, and remove the workpiece;

[0063] II. Install the workpiece in the second spring expansion sleeve 36, start the second oil cylinder 33, the second oil cylinder 33 drives the second spring expansion sleeve 36 to move downward under the limiting action of the third sliding groove 39 and the second sliding rod 310 through the second mounting screw 38, and when the second spring expansion sleeve 36 moves downward, it is extruded by the upper end inner wall inclined surface of the positioning seat 31, so that the second spring expansion sleeve 36 is inwardly shrunk to clamp the bearing, and the surface of the other side of the workpiece is machined;

[0064] III. Detect the fitting gap between the outer plane of the workpiece and the plane of the positioning seat 31 through the air detection hole 37 on the positioning seat 31, when the gap is greater than the set value, the air detection sensor sends information to the external controller, and the external controller controls to issue an alarm;

[0065] Preferably, the first oil cylinder 21 and the second oil cylinder 33 are connected with the external controller; which is conducive to realizing automatic operation;

[0066] The present application shortens the process route: cancels the first process of the original process, directly uses the original reference surface and the inner hole positioning to process the outer circle, thereby avoiding the error caused by the machining reference conversion between the first process and the second process of the original process;

[0067] When the machining center is used to replace the lathe to machine the part, the inner and outer circle center deviation of the blank can be corrected, the position degree of the part is very stable, thereby solving the problem that the machining precision is restricted by the precision of the blank due to the fact that the lathe machining can only copy the center of the outer circle of the blank;

[0068] The present application further realizes clamping multiple workpieces at a time, and can be completed on the same machine, and the machining efficiency can be improved by more than 50% than the original.

[0069] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A machining clamp of a bearing seat, comprising a mold mounting seat (1), characterized in that: a plurality of groups of first clamps (2) for clamping workpieces so as to machine one side surface of the workpieces are mounted on the mold mounting seat (1); the first clamps (2) comprise a lower expansion assembly, a lower positioning assembly, a pressing assembly and a first guide assembly; the lower expansion assembly is mounted on the mold mounting seat (1), and the lower positioning assembly, the pressing assembly and the first guide assembly are all mounted on the lower expansion assembly; a plurality of groups of second clamps (3) for clamping workpieces so as to machine the other side surface of the workpieces are mounted on the mold mounting seat (1); the lower expansion assembly comprises a first oil cylinder (21), a first support seat (22), a first spring expansion sleeve (29), a first mounting screw (213) and a first expansion mandrel (215); the first oil cylinder (21) is fixedly connected to the bottom of the mold mounting seat (1), the lower end of the first expansion mandrel (215) is fixedly connected to the output end of the upper end of the first oil cylinder (21) through the first mounting screw (213), the first support seat (22) is fixedly installed on the upper surface of the mold mounting seat (1), the upper end inner wall inclined surface of the first spring expansion sleeve (29) is in abutting contact connection with the top circular truncated cone side wall of the first expansion mandrel (215), and the lower end of the first spring expansion sleeve (29) is fixedly connected to the lower positioning assembly; the lower end of the first support seat (22) is inserted into the mold mounting seat (1), and the first expansion mandrel (215) passes through the first support seat (22) and the first spring expansion sleeve (29); the lower positioning assembly comprises support nails (24), first positioning insertion rods (25), first positioning insertion rod mounting plates (26), a first support cylinder (210) and first rhombic positioning pins (211); the top of the first support seat (22) is provided with the first support cylinder (210), and the lower end of the first spring expansion sleeve (29) is fixedly connected to the inside of the first support cylinder (210); a plurality of groups of the support nails (24) are fixedly connected to the top of the first support cylinder (210) and are in contact with the bottom of the workpiece, the top of the first support seat (22) is fixedly connected with the first positioning insertion rod mounting plates (26) in a symmetrical manner, the top of each first positioning insertion rod mounting plate (26) is fixedly connected with the first positioning insertion rod (25), the top of the first positioning insertion rod (25) is in contact with the bottom of the workpiece, and the first rhombic positioning pin (211) is vertically inserted into the first support seat (22) and the first support cylinder (210). The pressing assembly comprises a quick-release pressing plate (23), a first lower pull rod (27), a dust cover (28) and a compression spring (212); the upper end of the first expansion mandrel (215) is fixedly connected with the dust cover (28), the first lower pull rod (27) is in sliding connection with the dust cover (28), the lower end of the first lower pull rod (27) is in sliding connection inside the first expansion mandrel (215), the first lower pull rod (27) is sleeved with the compression spring (212), and the compression spring (212) is located inside the first expansion mandrel (215); the upper end of the first lower pull rod (27) is insertedly installed with the quick-release pressing plate (23), and the bottom of the quick-release pressing plate (23) is in contact with the top of the workpiece.

2. The machining jig for a bearing seat according to claim 1, characterized by The quick-release pressing plate (23) is provided with a locking hole which is identical in shape with the top of the first lower pull rod (27).

3. The machining fixture for a bearing seat according to claim 2, characterized in that, The first guide assembly comprises a first sliding rod (214) and a first sliding groove (216); the lower end side wall of the first expansion mandrel (215) is fixedly connected with the first sliding rod (214), and the first sliding rod (214) is in up-down sliding connection in the first sliding groove (216) which is formed in the lower end inner wall of the first support base (22).

4. The machining fixture for a bearing seat according to claim 3, characterized in that, The second clamp (3) comprises a positioning seat (31), a second support base (32), a second oil cylinder (33), a second rhombic positioning pin (34), a second rhombic positioning pin mounting hole (35), a second spring expansion sleeve (36), a gas detection hole (37), a second mounting screw (38) and a second guide assembly; the second oil cylinder (33) is fixedly connected to the bottom of the mold mounting base (1), the second support base (32) is fixedly connected to the top of the mold mounting base (1), the top of the second support base (32) is fixedly connected with the positioning seat (31), the output end of the upper end of the second oil cylinder (33) is fixedly connected with the second spring expansion sleeve (36) through the second mounting screw (38), the second spring expansion sleeve (36) is located inside the positioning seat (31), and the top of the second spring expansion sleeve (36) is in contact connection with the inclined surface of the upper end inner wall of the positioning seat (31), the second rhombic positioning pin (34) is inserted into the second rhombic positioning pin mounting hole (35) formed in the top of the positioning seat (31), and the top of the second rhombic positioning pin (34) protrudes from the second rhombic positioning pin mounting hole (35).

5. The machining fixture for a bearing seat according to claim 4, characterized in that, The inside of the side of the positioning seat (31) is provided with two groups of gas detection holes (37), which are used for connecting the positioning seat (31) and the gas detection sensor.

6. The machining fixture for a bearing seat according to claim 5, characterized in that, The second guide assembly comprises a third sliding groove (39) and a second sliding rod (310); the middle of the second spring expansion sleeve (36) is provided with a vertical third sliding groove (39), the inside of the third sliding groove (39) is in sliding connection with the second sliding rod (310), and the second sliding rod (310) is fixedly installed on the inner wall of the positioning seat (31).

7. A method of machining a machining jig of a bearing seat as defined in claim 6, characterized by, The method comprises the following steps: I. The workpiece is installed on the first spring expansion sleeve (29), the fast dismounting pressure plate (23) is rotated to lock the first lower pull rod (27), the first oil cylinder (21) is started, the first oil cylinder (21) drives the first expansion mandrel (215) to move downward under the limiting action of the first sliding groove (216) and the first sliding rod (214) through the first mounting screw (213), the first expansion mandrel (215) extrudes the upper end inner wall inclined surface of the first spring expansion sleeve (29) outward through the top inverted truncated cone side wall, the first spring expansion sleeve (29) side wall is scattered along the fracture line opened therein, so that the outer wall of the first spring expansion sleeve (29) is in close contact with the inner wall of the workpiece, the workpiece is clamped and fixed, the surface of the workpiece is processed, after the processing is completed, the fast dismounting pressure plate (23) is rotated to release the first lower pull rod (27), and the workpiece is removed; II. The workpiece is installed in the second spring expansion sleeve (36), the second oil cylinder (33) is started, the second oil cylinder (33) drives the second spring expansion sleeve (36) to move downward under the limiting action of the third sliding groove (39) and the second sliding rod (310) through the second mounting screw (38), when the second spring expansion sleeve (36) moves downward, the second spring expansion sleeve (36) is extruded by the upper end inner wall inclined surface of the positioning seat (31), the bearing is clamped inward, and the other side surface of the workpiece is processed; III. The air detection hole (37) on the positioning seat (31) is used to detect the fitting gap between the outer plane of the workpiece and the plane of the positioning seat (31), when the gap is greater than the set value, the air detection sensor sends information to the external controller, and the external controller controls to issue an alarm.

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