CN204397504U - A kind of parallel machine - Google Patents

Abstract

The utility model discloses a parallel machine tool. The machine tool includes a workbench, a support frame is arranged on the workbench, a top plate is arranged on the support frame, four first motors are arranged on the top plate, the output shafts of the first motors face vertically downward, and the output shafts of the first motors are fixed on the There is a lead screw, and a nut is fitted on the lead screw. Two vertical through holes are arranged on both sides of the nut, and a guide rod runs through the through hole. Four support platforms are fixed on the workbench, and a second Motor, the support platform is provided with a first turntable, the output shaft of the second motor is fixed with the first turntable, the lower bottom surface of the top plate is provided with four second turntables, the lower end surface of the guide rod is fixed on the first turntable, the guide rod The upper end surface is fixed on the second turntable; the inner surface of the nut is provided with connecting lugs, and a hydraulic push rod is connected to the connecting lugs. The telescopic end of the hydraulic push rod is connected to the moving platform through the Hooke hinge. Main motor, the output shaft of the main motor is fixed with a tool chuck.

Description

a parallel machine tool

technical field

The utility model belongs to the technical field of machining machine tools, in particular to a parallel machine tool.

Background technique

The tandem machine tool is a machine tool that is linked and connected in series by multiple axes. The tool of the tandem machine tool can only be fed along the fixed guide rail. Low, cannot process workpieces with complex shapes, etc. The emergence of parallel machine tools solves the above problems. The parallel machine tool is driven by a multi-rod parallel mechanism, which greatly improves the rigidity of the machine tool and greatly improves the machining accuracy and quality. High-speed and ultra-high-speed processing are easier to achieve. Because this kind of machine tool has the advantages of high rigidity, high load capacity, high speed, high precision, light weight, no error accumulation, simple mechanical structure, low manufacturing cost, and high degree of standardization, parallel machine tools have become a hot spot in the research of processing and manufacturing industries. Although the parallel machine tool is superior to the traditional serial machine tool in many aspects, due to the lack of geometric characteristics of the parallel mechanism, the working space is small, and the processing range of the parallel machine tool is small, and it can only process parts of a certain size. Or the processing of parts that are too small is difficult.

Utility model content

The purpose of the utility model is to provide a parallel machine tool, which expands the working space and widens the size range of the processed parts, and the parallel machine tool has simple structure, strong bearing capacity, no cumulative error, and sensitive action.

In order to achieve the above-mentioned technical purpose, the utility model adopts the following technical solutions to realize.

A parallel machine tool, characterized in that it includes a workbench, a support frame is arranged on the workbench, a top plate is arranged on the support frame, four first motors are arranged on the top plate, and the four first The motors are evenly arranged on the same circumference, the output shaft of the first motor is vertically downward, and a lead screw is fixed on the output shaft of each first motor, and a nut is fitted on the lead screw, and the nut is Two vertical through holes are arranged on both sides, and a guide rod runs through each through hole. Four support platforms are fixed on the workbench, and a second motor is arranged on each support platform. The support A first turntable is arranged on the table, the output shaft of the second motor is fixed to the first turntable, four second turntables are arranged on the lower bottom surface of the top plate, and the lower end surface of the guide rod is fixed on the first turntable, The upper end surface of the guide rod is fixed on the second turntable;

The inner surface of each nut is provided with a connecting ear, and a hydraulic push rod is rotatably connected to the connecting ear, and the telescopic end of the hydraulic push rod is connected to a moving platform through a Hooke hinge. As for the main motor, the lower bottom surface of the moving platform is provided with a tool holder, and the output shaft of the main motor is fixedly connected with the tool holder.

The characteristics and further improvement of this technical solution are:

The Hooke hinge includes a first U-shaped connecting piece connected to the telescopic end of the hydraulic push rod and a second U-shaped connecting piece connected to the moving platform, and two sides of the first U-shaped connecting piece are symmetrically arranged. The first bearing and two second bearings are symmetrically arranged on both sides of the second U-shaped connecting member, and a cross shaft is arranged between the first bearing and the second bearing.

The screw is a ball screw.

A bearing is arranged between the second turntable and the top plate.

The end of the screw is provided with an encoder, the nut is provided with an angle sensor; the telescopic rod of the hydraulic push rod is provided with a displacement sensor.

In the parallel machine tool of the utility model, the lead screw is driven to rotate by the first motor, and the rotation of the lead screw and the limit function of the guide rod make the nut move up and down; the rotation of the second motor drives the first turntable to rotate, thereby driving the two guide rods and The nut rotates around the lead screw to realize the rotation of the nut, which expands the working space of the parallel machine tool and broadens the scope of application of the parallel machine tool; the hydraulic push rod is used to control the movement of the cutter head, and the combination of electrical control and hydraulic control is used to control the movement of the parallel machine tool Trajectory, combining the advantages of the two control methods to meet the work requirements of fast response, high processing precision and strong flexibility. The parallel machine tool expands the working space and widens the size range of the processed parts, and the parallel machine tool has simple structure, strong bearing capacity, no cumulative error and sensitive action.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Fig. 1 is the structural representation of a kind of parallel machine tool of the present utility model;

Fig. 2 is the structural representation of the installation of screw mandrel and guide rod shown in Fig. 1;

Fig. 3 is the structural representation of the Hooke hinge shown in Fig. 1;

Fig. 4 is the structural representation of the nut shown in Fig. 1;

In the figure: 1. Workbench; 2. Support frame; 3. Top plate; 4. First motor; 5. Lead screw; 6. Nut; 7. Guide rod; 8. Support platform; 9. Second motor; 10. First turntable; 11. Second turntable; 12. Connecting ear; 13. Hydraulic push rod; 14. Hooke hinge; 15. Moving platform; 16. Main motor; 17. Tool chuck;

141. The first U-shaped connector; 142. The second U-shaped connector; 143. The first bearing; 144. The second bearing; 145. The cross shaft.

Detailed ways

Referring to Fig. 1, it is a structural schematic diagram of a parallel machine tool of the present utility model; the parallel machine tool includes a workbench 1, a support frame 2 is arranged on the workbench 1, a top plate 3 is arranged on the support frame 2, and four A first motor 4, four first motors 4 are evenly arranged on the same circumference, the output shaft of the first motor 4 is vertically downward, and a lead screw 5 is fixed on the output shaft of each first motor 4, and the screw 5 is fixed on the output shaft of the first motor 4. A nut 6 is fitted on the bar 5, two vertical through holes are arranged on both sides of the nut 6, a guide rod 7 runs through each through hole, and four support platforms 8 are fixed on the workbench 1, each support A second motor 9 is arranged on the platform 8. In the present embodiment, the second motor 9 is arranged under the support platform 8, and the rotating shaft of the second motor 9 stretches out from the support platform 8. The second motor 9 can also be directly fixed on the support platform. 8 above; the support platform 8 is provided with a first turntable 10, the first turntable 10 is not in contact with the support platform 8 in this embodiment, the first turntable 10 and the support platform 8 can also be set as a contact shape, in the first turntable 10 and the support platform 8 are installed with plane bearings to reduce friction; the output shaft of the second motor 9 is fixed to the first turntable 10, the lower bottom surface of the top plate 3 is provided with four second turntables 11, and the lower end surface of the guide rod 7 is fixed on the first turntable 10, the upper end surface of the guide rod 7 is fixed on the second turntable 11;

The inner surface of each nut 6 is provided with a connecting ear 12, on which a hydraulic push rod 13 is rotatably connected, and the telescopic end of the hydraulic push rod 13 is connected with a moving platform 15 through a Hooke hinge 14, and the upper top surface of the moving platform 15 A main motor 16 is provided, and a tool holder 17 is provided on the lower surface of the moving platform 15 , and the output shaft of the main motor 16 is fixedly connected with the tool holder 17 .

Wherein, the Hooke hinge 14 includes a first U-shaped connecting piece 141 connected with the telescopic end of the hydraulic push rod 13 and a second U-shaped connecting piece 142 connected with the moving platform 15, and the two sides of the first U-shaped connecting piece 141 are symmetrical Two first bearings 143 are provided, two second bearings 144 are symmetrically provided on both sides of the second U-shaped connecting member 142 , and a cross shaft 145 is provided between the first bearings 142 and the second bearings 143 .

Wherein, the lead screw 3 is a ball screw, which has small friction and high efficiency.

Wherein, a bearing is provided between the second turntable 11 and the top plate 3 , and the second turntable 11 rotates relative to the top plate 3 through the bearing.

Wherein, the end of the lead screw 3 is provided with an encoder, and the nut 6 is provided with an angle sensor; the telescopic rod of the hydraulic push rod 13 is provided with a displacement sensor, through which the control part of the parallel machine tool forms a closed-loop control to improve the machining accuracy.

When using the parallel machine tool, firstly, the parts to be processed are clamped and positioned, and the movement trajectory of the tool is planned according to the specific size of the part and the tool used, and its movement trajectory is entered into the corresponding computer. Through a series of Calculate and determine the positional relationship of each component of the parallel machine tool when the tool is at each different point; when the machine tool is processing, the control part sends a control command to the moving part through the corresponding communication interface, and obtains the current position of the moving part through the communication interface parameters, and then the motion part completes the command processing, real-time trajectory planning and output control of the control part. The four first motors 4 and the four second motors 9 respectively control the corresponding nuts to move, and the four hydraulic control devices control the corresponding hydraulic pushers respectively. The rod moves, and then controls the positional relationship of the braking platform 15, thereby realizing various movements of the cutter. During the machining process of the machine tool, the incremental signal of the nut and the movement signal of the telescopic rod are fed back to the control part in real time to ensure the accuracy of the machining process. In addition, the combination of electrical control and hydraulic control can combine the characteristics of fast response of electrical control and high precision of hydraulic control to improve the comprehensive performance of parallel machine tools.

In the parallel machine tool of the present utility model, the first motor 4 drives the lead screw 5 to rotate, and the rotation of the lead screw 5 and the limiting action of the guide rod 7 make the nut 6 move up and down; the rotation of the second motor 9 drives the first turntable to rotate 10, Thereby drive two guide rods 7 and nut 6 to rotate around lead screw 5, realize the rotation of nut 6, expand the working space of parallel machine tool, broaden the scope of application of parallel machine tool; Application hydraulic pressure push rod 13 controls the motion of cutter head, and electric The control and hydraulic control are combined to control the movement trajectory of the parallel machine tool, and the advantages of the two control methods are combined to meet the work requirements of fast response, high machining accuracy and strong flexibility. The parallel machine tool expands the working space and widens the size range of the processed parts, and the parallel machine tool has simple structure, strong bearing capacity, no cumulative error and sensitive action.

Although the embodiments of the present utility model have been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above-mentioned specific embodiments and application fields, and the above-mentioned specific embodiments are only illustrative, instructive, and not limiting sexual. Under the enlightenment of the description, those skilled in the art can also make many forms without departing from the protection scope of the claims of the present invention, and these all belong to the protection of the present invention.

Claims (5)

1. a parallel machine, it is characterized in that, comprise workbench, described workbench is provided with bracing frame, support frame as described above is provided with top board, described top board is provided with four the first motor, described four the first motor are evenly arranged on circumferentially same, the output shaft of described first motor vertically down, the output shaft of each first motor is fixed with a leading screw, described leading screw is combined with nut, the both sides of described nut are provided with two vertical through holes, run through in each through hole and have a guide rod, described workbench is fixed with four brace tables, each brace table is provided with second motor, described brace table is provided with the first turntable, output shaft and first turntable of described second motor are fixed, the bottom surface of described top board is provided with four the second turntables, the lower surface of described guide rod is fixed on the first turntable, the upper surface of described guide rod is fixed on the second turntable,

The medial surface of each nut is provided with engaging lug, described engaging lug is rotatably connected to hydraulic push rod, the telescopic end of described hydraulic push rod is connected with moving platform by Hooke's hinge, the upper end face of described moving platform is provided with mair motor, the bottom surface of described moving platform is provided with cutter chuck, and the output shaft of described mair motor is fixedly connected with cutter chuck.

2. a kind of parallel machine according to claim 1, it is characterized in that, described Hooke's hinge comprises the first U-shaped connector be connected with the telescopic end of hydraulic push rod and the second U-shaped connector be connected with moving platform, the two sides of described first U-shaped connector are symmetrically arranged with two clutch shaft bearings, the two sides of described second U-shaped connector are symmetrically arranged with two the second bearings, are provided with cross axle between described clutch shaft bearing and the second bearing.

3. a kind of parallel machine according to claim 1, is characterized in that, described leading screw is ball-screw.

4. a kind of parallel machine according to claim 1, is characterized in that, is provided with bearing between described second turntable and top board.

5. a kind of parallel machine according to claim 1, is characterized in that, described leading screw end is provided with encoder, and described nut is provided with angular transducer; The expansion link of described hydraulic push rod is provided with displacement transducer.