CN106840644B - Reliability test bed for electromagnetic and electric push rod mixed loading tool rest - Google Patents
Reliability test bed for electromagnetic and electric push rod mixed loading tool rest Download PDFInfo
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- CN106840644B CN106840644B CN201710227463.5A CN201710227463A CN106840644B CN 106840644 B CN106840644 B CN 106840644B CN 201710227463 A CN201710227463 A CN 201710227463A CN 106840644 B CN106840644 B CN 106840644B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a reliability test device for a power tool rest of a machine tool, in particular to a reliability test bed for a tool rest loaded by mixing an electromagnetic push rod and an electric push rod, which solves the problems that the working condition of the tool rest on an inclined lathe bed cannot be simulated and the tool rest cannot be loaded in three directions simultaneously in the prior art, and comprises a tool rest supporting part, a cutting force loading part, a tool bar part and a torque loading part; the tool rest supporting component comprises an X-direction moving unit and a Y-direction moving unit; the cutter bar component is fixed on the power cutter rest; the power tool rest is fixed on the X-direction moving unit; the cutting force loading part is arranged on one side of the power tool rest; the cutting force loading part comprises an XY-direction electromagnetic loading unit and a Z-direction electric push rod loading unit; and a dynamometer in the torque loading component is connected with a power output shaft of the power tool rest. The invention is closer to the actual use state of the tool rest, and has the advantages of high universality, easy adjustment, simple structure and small volume.
Description
Technical Field
The invention relates to a reliability test device for a power tool rest of a machine tool, in particular to a reliability test bed for the power tool rest, which realizes action and static loading of the power servo tool rest of the machine tool through an electromagnetic push rod and an electric push rod and then realizes torque loading of the power servo tool rest through a dynamometer.
Background
The numerical control lathe is a high-precision and high-efficiency automatic machine tool. The multi-station power tool rest is arranged, the lathe has wide processing technology performance, composite processing such as turning, milling, drilling and the like can be realized, and the processing efficiency is greatly improved. However, the power tool rest has a complex structure, so that a plurality of fault types are generated, and the performance and the reliability of the power tool rest directly influence the operating efficiency of the main machine and the quality of processed products. According to statistics, the maintenance amount of the numerical control tool rest is up to 50% of the total fault maintenance amount of the numerical control machine tool, so that a reliability test is necessary for evaluating and improving the reliability of the numerical control tool rest.
At present, some reliability test devices for tool rests are provided, most of the reliability test devices adopt a tool rest idling mode for testing, a loading device is provided for simulating the cutting force of the tool rest in the actual machining process generally through a hydraulic loading mode, but the hydraulic loading occupies a large space, the loading angle is not easy to adjust, hydraulic oil is easy to leak, and the reliability test device only simulates the working condition of the tool rest in a flat lathe bed. The invention provides a reliability test bed loaded by mixing an electromagnetic push rod and an electric push rod, which is closer to the actual use working condition of a tool rest and solves the problems of the existing tool rest reliability test bed.
Disclosure of Invention
The invention aims to solve the technical problems that the working condition of a tool rest on a slant bed cannot be simulated and the tool rest cannot be loaded in three directions simultaneously in the prior art, and provides a novel reliability test bed which can simulate the use working condition of the slant bed of the tool rest and is loaded by an electric push rod and an electromagnet in a mixed manner.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme, which is described by combining the accompanying drawings as follows:
a reliability test bed for a mixed loading tool rest of an electromagnetic and electric push rod is composed of a tool rest supporting component, a cutting force loading component, a tool bar component and a torque loading component fixed on a ground flat iron 1;
the tool rest supporting component comprises a tool rest supporting seat 11 connected with the ground flat iron 1, an X-direction moving unit and a Y-direction moving unit;
an included angle is formed between the upper surface of the tool rest supporting seat 11 and the ground, and the X-direction moving unit and the Y-direction moving unit have the same structure; the X-direction moving unit is fixed on the Y-direction moving unit, and the X-direction moving unit and the Y-direction moving unit are vertically arranged on the upper surface of the tool rest supporting seat 11;
the cutter bar component is fixed on the power cutter rest 8; the power tool rest 8 is fixed on the X-direction moving unit;
the cutting force loading part is arranged on one side of the power tool rest 8; the cutting force loading part comprises a loading support seat 2 connected with a ground flat iron 1, an XY-direction electromagnetic loading unit and a Z-direction electric push rod loading unit; the loading support seat 2 supports an XY-direction electromagnetic loading unit and a Z-direction electric push rod loading unit.
The dynamometer 9 in the torque loading component is connected with a power output shaft of the power tool rest 8.
In the technical scheme, the Y-direction moving unit comprises a bolt 15, a hand wheel pressing plate 17, a hand wheel 12, a flat key 18, a No. 1 bearing seat 13, a No. 1 tapered roller bearing 20, a No. 2 tapered roller bearing 21, a screw shaft 14, a nut plate 22, a No. 1 sliding block 23, a No. 2 sliding block 24, a No. 1 guide rail 26 and a No. 2 guide rail 25;
the No. 1 bearing seat 13 is connected with the tool rest support seat 11, and the No. 1 tapered roller bearing 20 and the No. 2 tapered roller bearing 21 are installed in the No. 1 bearing seat 13;
the hand wheel 12 is connected with the screw shaft 14 through a flat key 18, the left side of the hand wheel 12 is positioned through a shaft shoulder of the screw shaft 14, and the other side presses a hand wheel pressing plate 17 on the upper surface of the hand wheel 12 through a bolt 15, so that the hand wheel 12 and the screw shaft 14 are axially positioned;
the nut plate 22 is fixed on the Y-direction support plate 6, the screw shaft 14 and the nut plate 22 form a thread pair, the screw shaft 14 drives the Y-direction support plate 6 to move when rotating, a No. 1 slide block 23 and a No. 2 slide block 24 are fixed on the lower surface of the Y-direction support plate 6, the No. 1 slide block 23 and the No. 2 slide block 24 are installed on a No. 1 guide rail 25 and a No. 2 guide rail 26, the Y-direction support plate 6 can slide along the directions of the No. 1 guide rail 26 and the No. 2 guide rail 25, and the power knife rest 8 is fixed on the X-direction support plate 5 in the X-direction moving.
The XY-direction electromagnetic loading unit in the technical scheme comprises a servo motor 4, a driving rotating component, a driven rotating component and an electromagnetic loading unit, wherein the servo motor 4, the driving rotating component, the driven rotating component and the electromagnetic loading unit are fixed on a box body 10;
the driving rotating assembly comprises a No. 2 coupler 39, a No. 1 gear shaft 33, a No. 3 tapered roller bearing 42 and a No. 4 tapered roller bearing 46;
the No. 1 gear shaft 33 is connected with a motor shaft of the servo motor 4 through a No. 2 coupler 39, and the No. 3 tapered roller bearing 42 and the No. 4 tapered roller bearing 46 are fixed on the box body 10 through two bearing seats;
the passive rotating assembly comprises a No. 1 coupler 32, a No. 3 coupler 50, a No. 2 gear shaft 37, a No. 5 tapered roller bearing 52 and a No. 6 tapered roller bearing 56;
the electromagnetic loading unit comprises a loading disc 27, an electromagnet 28, a dynamometer 35 and a dynamometer support 34;
the No. 1 coupler 32 is connected with an electric push rod 3 in a Z-direction electric push rod loading unit, and the loading disc 27 and the box body 10 are fixed together through a No. 3 coupler 50; the No. 2 gear shaft 37 and the No. 1 gear shaft 33 in the driving rotating assembly form a pair of gear pairs;
the electromagnet 28, the load cell 35 and the load cell support 34 are fixed together, and the load cell support 34 is fixed on the loading tray 27.
Two sets of identical electromagnetic loading units are symmetrically arranged on the loading tray 27.
In the technical scheme, the Z-direction electric push rod loading unit comprises an electric push rod 3, a pin shaft 31, a cotter pin 30, a No. 3 guide rail 36 and a No. 3 sliding block 38;
the electric push rod 3 and the loading support seat 2 are fixed together through a pin shaft 31, a cotter pin 30 is inserted into a hole of the pin shaft 31, a No. 3 slide block 38 is fixedly connected with the box body 10, and a No. 3 guide rail 36 is fixedly connected with the loading support seat 2; the casing 10 in the XY-direction electromagnetic loading unit can move on the No. 3 guide rail 36 by the No. 3 slider 38.
The technical scheme is that the cutter bar component comprises a simulation cutter bar 7, a silicon steel sheet 61 and a loading rod 59;
the silicon steel sheet 61 is fixed on the simulation cutter bar 7 through the loading rod 59; the simulated cutter bar 7 is fixed on the power cutter frame 8.
The technical scheme is that the torque loading component further comprises a dynamometer base 62, a dynamometer 9 and a No. 4 coupling 63;
the dynamometer base 62 is fixedly connected with the ground flat iron 1, and an included angle is formed between the upper surface and the lower surface of the dynamometer base 62 and is the same as that of the loading support base 2;
the dynamometer 9 is fixedly connected with the dynamometer base 62, one end of the No. 4 coupler 63 is connected with the dynamometer 9, and the other end of the No. 4 coupler is connected with a power output shaft of the power tool rest 8.
Compared with the prior art, the invention has the beneficial effects that:
1. the tool rest reliability test bed provided by the invention adopts electromagnets and electric push rods to carry out dynamic cutting force loading in XYZ directions, and adopts a dynamometer to carry out torque loading at the same time, so as to simulate the cutting force and torque of the numerical control turret power tool rest in the real cutting process.
2. Simulate the in-service use operating mode of knife rest on oblique lathe bed through oblique lathe bed support component, press close to the in-service use state of knife rest more, the experimental data that obtain press close to more with in-service use to can test the knife rest of different center heights on this test bench, promoted the commonality of test bench
3. The cutting force loading part adopts a mode of mixed loading of electromagnetism and an electric push rod, and compared with a traditional hydraulic loading mode, the cutting force loading part avoids the defects of difficult adjustment, complex structure, large volume, easy leakage and the like of hydraulic loading, can simultaneously realize loading of a power knife rest in three directions, and is more consistent with real working conditions.
4. When the tool numbers of different cutter heads are tested, the electric push rod can automatically pull out the whole set of loading system, and the loading is carried out after the tool is changed to the target tool number, so that manual adjustment is not needed in the process, and automatic loading is realized.
Drawings
The invention is further described with reference to the accompanying drawings in which:
FIG. 1 is an axonometric view of a cutting resultant force loading and cutting torque loading device of a lathe tool rest reliability test bed loaded by an electromagnetic and electric push rod in the patent;
FIG. 2 is an exploded perspective view of the relative positions of the X-direction moving unit, the Y-direction moving unit and the cutting force loading component of the lathe tool rest reliability test bed with the combined loading of the electromagnetic and electric push rods;
FIG. 3 is an isometric projection of a tool holder support member of a lathe tool holder reliability test bed with combined electromagnetic and electric push rod loading according to the present patent;
FIG. 4-1 is an exploded perspective view of the Y-direction moving unit of the tool rest support member of the lathe tool rest reliability test bed with combined electromagnetic and electric push rod loading according to the present patent;
FIG. 4-2 is a partial enlarged view of an exploded perspective view of a Y-direction moving unit of a tool rest support member of a lathe tool rest reliability test bed with combined electromagnetic and electric push rod loading according to the present patent;
FIG. 5 is an axonometric view of a cutting force loading part of a lathe tool rest reliability test bed with combined loading of an electromagnetic push rod and an electric push rod, which is disclosed in the patent;
FIG. 6 is an exploded perspective view of an XY electromagnetic loading unit of a cutting force loading component of a lathe tool rest reliability test bed with combined loading of electromagnetic and electric push rods;
FIG. 7 is an exploded isometric projection of the tool holder assembly of the lathe tool rest reliability test bed with the combined loading of the electromagnetic and electric push rods according to the present patent;
FIG. 8 is an isometric projection of a simulated tool bar of a tool bar component of a lathe tool rest reliability test bed with combined loading of electromagnetic and electric pushrods as described in this patent;
FIG. 9 is an isometric projection of the loading rod of the torque loading component of the lathe tool rest reliability test bed with combined loading of the electromagnetic and electric push rods according to the present patent;
FIG. 10 is an isometric projection of the torque loading feature of the electromagnetic and electric push rod hybrid loading lathe tool rest reliability test bed described in this patent;
in the figure: 1. the device comprises a ground plain iron, 2. a loading support seat, 3. an electric push rod, 4. a servo motor, 5. an X-direction support plate, 6. a Y-direction support plate, 7. a simulation cutter bar, 8. a power tool rest, 9. a dynamometer, 10. a box body, 11. a tool rest support seat, 12. a hand wheel, 13.1 # bearing seat, 14. a screw shaft, 15. a bolt, 16.1 # spring washer, 17. a hand wheel press plate, 18. a flat key, 19.1 # end cover, 20.1 # tapered roller bearing 1,21.2 # tapered roller bearing, 22. a nut plate, 23.1 # slide block, 24.2 # slide block, 25.1 # guide rail, 26.2 # guide rail, 27. a loading disc, 28. an electromagnet, 29. a box cover, 30. a split pin, 31. a pin shaft, 32.1 # shaft coupling, 33.1 # gear shaft, 34. a dynamometer support, 35. a dynamometer, 36.3 # guide rail, 37.2 # gear shaft, 38.3 # slide block, 39.2 # coupler, 40.2 # tapered roller bearing seat, 41.42 # tapered roller bearing, no. 43.3 end cover, No. 44.4 end cover, No. 45.3 bearing seat, No. 46.4 tapered roller bearing, 47 stop washer, 48 round nut, No. 49.5 end cover, No. 50.3 shaft coupling, No. 51.6 end cover, No. 52.5 tapered roller bearing, No. 53.4 bearing seat, No. 54.7 end cover, No. 55.8 end cover, No. 56.6 tapered roller bearing, No. 57.5 bearing seat, No. 58.9 end cover, 59 loading rod, No. 60.2 spring washer, No. 61 silicon steel sheet, 62 dynamometer machine base, No. 63.4 shaft coupling.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the reliability test bed for the electromagnetic and electric push rod mixed loading tool rest consists of a tool rest supporting part, a cutting force loading part, a tool bar part and a torque loading part.
Knife rest supporting component
Referring to fig. 1 to 4, the tool post support member includes a tool post support base 11, an X-direction moving unit, and a Y-direction moving unit. The position of the tool post is changed by X, Y moving the position of the unit. (the X-direction and the Y-direction of the support member in the present invention are shown in FIG. 2). The upper surface of the tool rest supporting seat 11 and the ground form an included angle, and the use working condition of the tool rest of the inclined lathe bed can be simulated. The X-direction moving unit and the Y-direction moving unit comprise guide rails, the positions of the power tool rests can be changed in the XY directions, and the power tool rests can be adjusted according to different tool rests with different center heights, so that reliability tests can be conveniently carried out on the tool rests of various models.
The tool rest supporting seat 11 is of a welded structure and is formed by welding steel plates, an included angle is formed between the top end face and the bottom end face, the included angle is the angle of the inclined lathe bed, bolt holes are formed in the bottom plate, and the tool rest supporting seat is connected with the ground iron 1 through T-shaped bolts. The top surface of the top end surface is provided with a rectangular groove and a threaded hole for mounting the No. 1 guide rail 25 and the No. 2 guide rail 26.
The power tool post 8 is fixed to the X-direction moving unit of the tool post support member by a bolt.
A is a Y-direction moving unit, and B is an X-direction moving unit. The Y-direction moving unit is fixed on the tool rest supporting seat 11 through screws on a No. 1 guide rail 25 and a No. 2 guide rail 26, and the X-direction moving unit is fixed on the Y-direction supporting plate 6 through screws on the guide rails, so that the X-direction moving unit is driven to move on the guide rails along the Y direction in the Y-direction moving process of the Y-direction supporting plate 6. The X-direction support plate 5 is provided with 10 through holes through which the power tool holder 6 can be fixed to the X-direction support plate 5 by means of bolts and nuts, so that the tool holder moves in the X-direction and the Y-direction along with the X-direction and the Y-direction when the X-direction and Y-direction moving units move in the X-direction and the Y-direction, respectively. The cutting force loading part is fixed on the ground flat iron 1 through a loading support seat 6.
The principle of the X-direction moving unit is completely the same as that of the Y-direction moving unit, and the working principle is described below by taking the Y-direction moving unit as an example.
The Y-direction moving unit mainly can enable the tool rest 8 to move in the Y direction, and mainly comprises a bolt 15, a No. 1 spring washer 16, a hand wheel pressing plate 17, a hand wheel 12, a flat key 18, a No. 1 bearing seat 13, a No. 1 end cover 19, a No. 1 tapered roller bearing 20, a No. 2 tapered roller bearing 21, a screw shaft 14, a Y-direction supporting plate 6, a nut plate 22, a No. 1 sliding block 23, a No. 2 sliding block 24, a No. 1 guide rail 26 and a No. 2 guide rail 25.
No. 1 bearing seat 13 is connected with tool rest supporting seat 11 through the screw, installs two the same tapered roller bearings (tapered roller bearing 20 No. 1 and tapered roller bearing 21 No. 2 in No. 1 bearing seat 13, can bear radial and axial load simultaneously like this, passes through bolted connection between No. 1 end cover 19 and No. 1 bearing seat 13.
A keyway is provided in the screw shaft 14 in which the key 18 can be located, as well as a keyway in the bore of the hand wheel 12, to transmit rotation of the hand wheel 12 to the screw shaft 14. When the Y-direction position of the power tool rest 8 needs to be adjusted, the screw shaft 14 and the hand wheel 12 can be rotated simultaneously by rotating the hand wheel 12 by an operator. The hole on the hand wheel 12 is sleeved on the screw shaft 14, one side of the hand wheel 12 is positioned through a screw shaft shoulder, and the other side fixes the hand wheel 12 on the screw shaft 14 through a bolt 15 and a hand wheel pressure plate 17. And a spring washer is arranged between the hand wheel pressure plate 17 and the bolt 15 to play a role in preventing looseness.
The nut plate 22 is in a trapezoidal structure, the nut plate 22 is fixed on the Y-direction support plate 6 by means of two round holes above the nut plate 22 through screw connection with the Y-direction support plate 6, a threaded hole is arranged in the center of the nut plate 22, the front part of the screw shaft 14 is provided with an external thread, so that the screw shaft 14 and the nut plate 22 form a thread pair, the screw shaft 14 drives the Y-direction support plate 6 to move when rotating, sliders (No. 1 sliders 23 and No. 2 sliders 24) are connected on the lower surface of the support plate through screws, finally, the Y-direction support plate 6 can slide along the direction of the guide rails (No. 1 guide rail 26 and No. 2 guide rail 25), when the Y-direction support plate 6 moves towards the Y direction, the No. 1 sliders 23 and No. 2 sliders 24 can move towards the Y direction, and the No. 1 sliders 23 and No. 2 sliders 24 are fixed on the X-direction support plate 5 through screws, thus, the X, finally, the power tool holder 8 fixed to the X-direction support plate 5 is moved in the Y-direction.
Second, cutting force loading component
Referring to fig. 1,2, 5 and 6, the cutting force loading unit includes a loading support base 2, an XY-direction electromagnetic loading unit and a Z-direction electric push rod loading unit. (the X-direction, Y-direction, and Z-direction in the loading unit of the present invention are shown in FIG. 8). Referring to FIG. 2, C is a cutting force loading member
Cutting force loading supporting seat 2 is used for supporting XY to electromagnetism loading unit and Z to electric putter loading unit, and loading supporting seat 2 adopts welded structure, supports through two landing legs, is connected through T type bolt and ground flat bar 1, can fix cutting force loading part like this. The principle of the XY-direction electromagnetic unit is that XY-direction loading is realized through electromagnetic force between an electromagnet and an iron core. The iron core is formed by a plurality of silicon steel sheets in the cutter bar component, the loading force can be changed by changing the electromagnet current in the electromagnetic loading unit, the force in the XY direction, which needs to be loaded to the cutter frame, can be synthesized into a resultant force which is parallel to the radial direction of the loading disc, the loading disc 27 on the driven rotating assembly is finally driven to rotate through gear transmission, the rotating angle is the direction of the resultant force, the direction and the size of the XY-direction resultant force are respectively realized through the above steps, and the XY-direction loading force required by loading is finally met.
The Z-direction electric push rod unit can load the Z-direction force of the power tool rest 8, the electric push rod 3 pushes the whole XY electromagnetic loading unit, the loading disc 27 is finally contacted with the tool bar component, and the loading disc 27 is finally used for directly carrying out Z-direction loading on the power tool rest 8 through the loading force control of the electric push rod 3.
1. Loading supporting seat
Referring to fig. 5, the loading supporting seat 2 is formed by welding square steel, the loading supporting seat is supported by two supporting legs, the bottom of each supporting leg is a square steel plate, a unthreaded hole is formed in each steel plate, the steel plates are connected with a ground flat iron 1 through T-shaped bolts, and an inverted U-shaped support is arranged on the upper surface of the loading supporting seat and used for supporting an electric push rod 3.
XY-direction electromagnetic loading unit
Referring to fig. 1, the XY-direction electromagnetic loading unit includes a servo motor 4, an active rotating component, a passive rotating component, an electromagnetic loading unit, and a box 10.
The box body 10 is of a welded structure and is formed by welding steel plates, and the two sides of the box body are sealed through box covers, so that the dustproof and protective effects are achieved. There is a motor cabinet in the rear side of box 10, and the motor cabinet surface has the screw hole, fixes servo motor 4 on box 10 through four screws, and axial positioning is realized with the hole of the motor cabinet on the box 10 to servo motor 4's location cylinder.
Referring to fig. 6, the driving rotation assembly includes a coupler No. 2, a gear shaft No. 1, two identical rolling bearings (a tapered roller bearing No. 3 42 and a tapered roller bearing No. 4 46), two identical bearing seats (a bearing seat No. 2, a bearing seat No. 3, a bearing seat No. 45), four bearing seat end covers (a end cover No. 2, an end cover No. 3, an end cover No. 4, and an end cover No. 5, a round nut 48, and a lock washer 47. The No. 1 gear shaft 33 is connected with a motor shaft of the servo motor 4 through a No. 2 coupler 39, the rotation of the motor shaft can be transmitted to the No. 1 gear shaft 33, two bearing seats are fixed on the box body 10 through bolts and nuts at the bottom, tapered roller bearings are respectively installed in the bearing seats and used for supporting the rotary No. 1 gear shaft 33, threads are arranged on the right end face of the No. 1 gear shaft 33, and the No. 1 gear shaft 33 is axially fixed through the matching use of a round nut 48 and a stop washer 47.
The passive rotating assembly comprises two couplers (No. 1 coupler 32 and No. 3 coupler 50), a No. 2 gear shaft 37, two same rolling bearings (No. 5 tapered roller bearing 52 and No. 6 tapered roller bearing 56), two same bearing seats (No. 4 bearing seat 53 and No. 5 bearing seat 57), and four transparent covers (No. 6 end cover 51, No. 7 end cover 54, No. 8 end cover 55 and No. 9 end cover 58). Referring to fig. 5, the left coupler No. 1 32 is connected to the electric putter 3, and the right coupler No. 3 50 is connected to the loading plate 27. The gear shaft 37 No. 2 and the gear shaft 33 No. 1 in the driving rotation assembly form a pair of gear pairs, and the loading disc 27 can be finally rotated by the rotation of the servo motor 4.
Referring to fig. 5, the electromagnetic loading unit includes: loading disc 27, electromagnet 28, load cell 35, load cell support 34. The electromagnet 28 and the load cell 35 are fixed to the load cell holder 34 by screws, and are fixed to the side of the load cell holder 34 by two screws, so that the electromagnetic load cell is integrally fixed to the load cell 27. The cutting force can be decomposed into component forces in three directions of XYZ, the loading force in the XY direction can be synthesized into a resultant force parallel to the radial direction of the loading disc 27, the magnitude of the current of the electromagnet 28 is changed, namely the electromagnetic force between the electromagnet and the cutter bar component is changed, so that the resultant force in the XY direction is simulated, the angle of the resultant force can be realized by changing the angle of the loading disc 27, the magnitude of the loading force is measured by the dynamometer 35, and the required XY-direction loading force is accurately applied by closed-loop control so as to meet the test requirements. Considering the limited loading force of a single electromagnet, two sets of identical electromagnetic loading units are symmetrically arranged on the loading disc 27.
Z-direction electric push rod loading unit
The Z-direction electric push rod loading unit comprises an electric push rod 3, a pin shaft 31, a cotter pin 30, a No. 3 guide rail 36 and a No. 3 sliding block 38.
One end of the electric push rod 3 is fixed on the support, the electric push rod 3 can push X, Y to move integrally to the electric measuring loading unit by controlling the extension length of the piston rod of the electric push rod 3, and finally the loading disc 27 moves back and forth, when the loading disc 27 is contacted with the loading rod 59 on the cutter bar component, the Z-direction loading of the power cutter rest 8 can be realized, and the loading can be realized according to the required loading force by controlling the thrust of the electric push rod 3.
Referring to fig. 5, the mounting hole behind the electric push rod 3 and the inverted U-shaped support on the loading support base 2 are fixed together by a pin 31, a cotter 30 is inserted into the hole of the pin 31, so that the axial movement of the pin 31 can be prevented, and the piston rod of the electric push rod 3 is connected with a coupler No. 1 32. The No. 3 sliding block 38 is connected with the box body 10 through a bolt, the No. 3 guide rail 36 is fixed with the loading support seat 2 through a screw, and when the length of a piston rod of the electric push rod 3 changes, the whole box body 10 moves along the No. 3 guide rail 36; the loading disc and the box body are fixed together through a No. 3 coupler 50, and when the box body 10 moves, the loading disc 27 moves together with the box body 10, so that the movement of the loading disc 27 can be controlled; when the loading disc is contacted with the cutter bar, the Z-direction loading force of the cutter bar can be changed by changing the thrust of the electric push rod 3.
Third, the knife bar part
Referring to fig. 7 to 9, the tool bar assembly includes a dummy tool bar 7, a silicon steel sheet 61, a No. 2 spring washer 60, and a loading bar 59.
The silicon steel sheet 61 is fixed on the simulation cutter bar 7 through the loading rod 59, so that an integral iron core is formed, the electromagnet 28 can load force on the iron core, finally, the force acts on the simulation cutter bar 7, the X-direction force and the Y-direction force of the cutter frame can be combined into a resultant force parallel to the radial direction of the loading disc, and the variation of the loading force angle is changed through the rotation of the loading disc 27, so that the X-direction resultant force and the Y-direction resultant force can be simulated. And the Z-direction loading of the power knife rest 8 is realized when a piston rod of the electric push rod 3 is contacted with the simulation knife bar 7. (X, Y, Z Direction is shown in FIG. 7)
The simulation cutter bar 7 is a cylindrical rod piece with different diameters at two ends, the thick section of the simulation cutter bar is connected with the cutter holder of the power cutter holder 8, the simulation cutter bar 7 can be fixed on the power cutter holder 8, and a plurality of silicon steel sheets 61 are sleeved on the cylindrical rod with the thinner end. The thin side end face of the simulation cutter bar 7 is provided with a threaded hole, the bottom of the loading rod 59 is provided with an external thread, the loading rod can be screwed on the simulation cutter bar 7, so that a silicon steel sheet 61 can be fixed on the simulation cutter bar 7 to form an iron core, a No. 2 spring washer 60 is arranged between the loading rod 59 and the silicon steel sheet 62 to play a role in preventing looseness, the other surface of the loading rod is spherical and can be matched with a cylindrical hole in the outer side of the loading disc 27, and Z-direction loading is facilitated.
Fourth, the torsion loading part
Referring to fig. 10, the torque loading components include a dynamometer base 62, a dynamometer 9, and a No. 4 coupling 63. The dynamometer 9 is connected with a power output shaft of the power tool rest 8 through a No. 3 coupler 63, when the torque loading is needed to be carried out on the power tool rest, the dynamometer 9 is set according to the size of the torque to be loaded, the loading size is achieved, and the torque loading on the tool rest (8) is completed.
The dynamometer base 62 is fixed with the ground flat iron 1 through a T-shaped bolt, the dynamometer base 62 is formed by welding steel plates, an included angle is formed between the upper surface and the lower surface of the dynamometer base, and the included angle is the same as that of the loading supporting base 2. The dynamometer 9 is fixed with the dynamometer base 62 through bolts, an output flange of the dynamometer 9 is connected with a No. 4 coupling 63 through bolts, and the other end of the No. 4 coupling 63 is connected with a power output shaft of the power tool rest 8.
The power tool rest 8 is fixed above the X-direction support plate 5 of the tool rest support component through bolts, and the simulation tool bar 7 and the power tool rest 8 are fixed together through a tool holder on the power tool rest 8. The cutting force loading component is arranged on the left side of the power tool rest 8, when the power tool rest 8 needs to be loaded, the electric push rod pushes the whole cutting force loading component to move along the horizontal direction, the loading disc 27 is in contact with the loading rod 59 to apply a Z-direction cutting force, the electromagnet 28 and the plurality of silicon steel sheets 61 in the tool bar component generate electromagnetic force, and resultant force in the X direction and the Y direction is applied. The shaft of the dynamometer 9 in the torque loading part is coaxial with the power output shaft of the power tool rest 8 and is connected with the power output shaft of the power tool rest 8 through a No. 4 coupler 63.
The embodiments described in the present invention are for facilitating the understanding and application of the present invention by those skilled in the art, and are a specific technical solution rather than a limitation. If the related technical personnel make equivalent structural changes or various modifications without creative efforts while adhering to the basic technical solution of the present invention, the protection scope of the present invention is covered.
Claims (7)
1. The utility model provides an electromagnetism and electric putter mixed loading knife rest reliability test platform which characterized in that: the device consists of a tool rest supporting component, a cutting force loading component, a tool bar component and a torque loading component fixed on a ground flat iron (1);
the tool rest supporting component comprises a tool rest supporting seat (11) connected with the ground flat iron (1), an X-direction moving unit and a Y-direction moving unit;
an included angle is formed between the upper surface of the tool rest supporting seat (11) and the ground, and the X-direction moving unit and the Y-direction moving unit are identical in structure; the X-direction moving unit is fixed on the Y-direction moving unit, and the X-direction moving unit and the Y-direction moving unit are vertically arranged on the upper surface of the tool rest supporting seat (11);
the cutter bar component is fixed on the power cutter rest (8); the power tool rest (8) is fixed on the X-direction moving unit;
the cutting force loading part is arranged on one side of the power tool rest (8); the cutting force loading part comprises a loading support seat (2) connected with a ground flat iron (1), an XY-direction electromagnetic loading unit and a Z-direction electric push rod loading unit; the loading support seat (2) supports an XY-direction electromagnetic loading unit and a Z-direction electric push rod loading unit;
and a dynamometer (9) in the torque loading part is connected with a power output shaft of the power tool rest (8).
2. The reliability test bed for the electromagnetic and electric push rod hybrid loading tool rest according to claim 1, is characterized in that:
the Y-direction moving unit comprises a bolt (15), a hand wheel pressing plate (17), a hand wheel (12), a flat key (18), a No. 1 bearing seat (13), a No. 1 tapered roller bearing (20), a No. 2 tapered roller bearing (21), a screw shaft (14), a nut plate (22), a No. 1 sliding block (23), a No. 2 sliding block (24), a No. 1 guide rail (26) and a No. 2 guide rail (25);
the No. 1 bearing seat (13) is connected with the tool rest supporting seat (11), and the No. 1 tapered roller bearing (20) and the No. 2 tapered roller bearing (21) are installed in the No. 1 bearing seat (13);
the hand wheel (12) is connected with the screw shaft (14) through a flat key (18), the left side of the hand wheel (12) is positioned through the shaft shoulder of the screw shaft (14), and the other side presses a hand wheel pressing plate (17) on the upper surface of the hand wheel (12) through a bolt (15), so that the hand wheel (12) and the screw shaft (14) are axially positioned;
the nut plate (22) is fixed on the Y-direction supporting plate (6), the screw shaft (14) and the nut plate (22) form a thread pair, the screw shaft (14) drives the Y-direction supporting plate (6) to move when rotating, the No. 1 sliding block (23) and the No. 2 sliding block (24) are fixed on the lower surface of the Y-direction supporting plate (6), the No. 1 sliding block (23) and the No. 2 sliding block (24) are installed on the No. 1 guide rail (25) and the No. 2 guide rail (26), the Y-direction supporting plate (6) can slide along the directions of the No. 1 guide rail (26) and the No. 2 guide rail (25), and the power tool rest (8) is fixed on the X-direction supporting plate (5) in the X-direction moving unit.
3. The reliability test bed for the electromagnetic and electric push rod hybrid loading tool rest according to claim 1, is characterized in that:
the XY-direction electromagnetic loading unit comprises a servo motor (4) fixed on a box body (10), a driving rotating assembly, a driven rotating assembly and an electromagnetic loading unit;
the driving rotating assembly comprises a No. 2 coupling (39), a No. 1 gear shaft (33), a No. 3 tapered roller bearing (42) and a No. 4 tapered roller bearing (46);
the No. 1 gear shaft (33) is connected with a motor shaft of the servo motor (4) through a No. 2 coupler (39), and the No. 3 tapered roller bearing (42) and the No. 4 tapered roller bearing (46) are fixed on the box body (10) through two bearing seats;
the passive rotating assembly comprises a No. 1 coupler (32), a No. 3 coupler (50), a No. 2 gear shaft (37), a No. 5 tapered roller bearing (52) and a No. 6 tapered roller bearing (56);
the electromagnetic loading unit comprises a loading disc (27), an electromagnet (28), a dynamometer (35) and a dynamometer support (34);
the No. 1 coupling (32) is connected with an electric push rod (3) in a Z-direction electric push rod loading unit, and a loading disc (27) is fixed with the box body (10) through a No. 3 coupling (50); the No. 2 gear shaft (37) and the No. 1 gear shaft (33) in the driving rotating assembly form a pair of gear pairs;
the electromagnet (28), the dynamometer (35) and the dynamometer support (34) are fixed together, and the dynamometer support (34) is fixed on the loading disc (27).
4. The reliability test bed for the electromagnetic and electric push rod hybrid loading tool rest according to claim 3, is characterized in that:
two sets of the same electromagnetic loading units are symmetrically arranged on the loading disc (27).
5. The reliability test bed for the electromagnetic and electric push rod hybrid loading tool rest according to claim 1, is characterized in that:
the Z-direction electric push rod loading unit comprises an electric push rod (3), a pin shaft (31), a cotter pin (30), a No. 3 guide rail (36) and a No. 3 sliding block (38);
the electric push rod (3) and the loading support seat (2) are fixed together through a pin shaft (31), a cotter pin (30) is inserted into a hole of the pin shaft (31), a No. 3 sliding block (38) is fixedly connected with the box body (10), and a No. 3 guide rail (36) is fixedly connected with the loading support seat (2); a box body (10) in the XY direction electromagnetic loading unit can move on a No. 3 guide rail (36) through a No. 3 slide block (38).
6. The reliability test bed for the electromagnetic and electric push rod hybrid loading tool rest according to claim 1, is characterized in that:
the cutter bar component comprises a simulation cutter bar (7), a silicon steel sheet (61) and a loading rod (59);
a silicon steel sheet (61) is fixed on the simulation cutter bar (7) through a loading rod (59); the simulation cutter bar (7) is fixed on the power cutter rest (8).
7. The reliability test bed for the electromagnetic and electric push rod hybrid loading tool rest according to claim 1, is characterized in that:
the torque loading component further comprises a dynamometer base (62) and a No. 4 coupling (63);
the dynamometer base (62) is fixedly connected with the ground flat iron (1), and an included angle is formed between the upper surface and the lower surface of the dynamometer base (62), and is the same as that of the loading support base (2);
dynamometer (9) and dynamometer base (62) fixed connection, 4 number shaft coupling (63) one end is connected with dynamometer (9), and the 4 number shaft coupling other end is connected with the power take off axle of power knife rest (8).
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| CN107246963A (en) * | 2017-07-31 | 2017-10-13 | 雷天动力设备（苏州）有限公司 | A kind of electronic strut test device |
| CN108273928B (en) * | 2018-01-27 | 2019-05-10 | 杭州银洲工具有限公司 | It is a kind of for processing the punching machine mold of tubular workpiece |
| CN108414213B (en) * | 2018-05-31 | 2019-08-20 | 东北大学 | A kind of kinetic servo knife rest reliability test bench |
| CN110542575A (en) * | 2019-09-19 | 2019-12-06 | 吉林大学 | test bed for simulating reliability of power servo tool rest of numerical control machine tool under real working condition |
| CN112414692B (en) * | 2020-11-30 | 2022-02-25 | 吉林大学 | High-frequency simulation loading double-servo power tool rest reliability test method |
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