High-precision translation positioning structure for multi-wire cutting machine

Abstract

The utility model provides a high-precision translation positioning structure for a multi-wire cutting machine, and belongs to the technical field of cutting machines. The problem of how to improve the positioning accuracy is solved. According to the high-precision translation positioning structure for the multi-wire cutting machine, the multi-wire cutting machine comprises a base internally provided with a cavity and a carrier plate connected to the base in a sliding mode, a driving device is connected to the base, a lead screw fixedly connected with the driving end of the driving device is arranged in the cavity in the horizontal direction, and a nut assembly stretching into the cavity is connected to the carrier plate; the lead screw is in threaded connection with the nut assembly, the high-precision translation positioning structure comprises a first elastic piece and a second elastic piece, the first elastic piece and the second elastic piece are arranged outside the lead screw in a sleeving mode and located on the two sides of the nut assembly respectively, the first elastic piece abuts against one side of the nut assembly in the axial direction of the lead screw, and the second elastic piece abuts against the other side of the nut assembly in the axial direction of the lead screw. According to the high-precision translation positioning structure for the multi-wire cutting machine, the positioning precision can be improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cutting machine technical field relates to a kind of high-precision translation positioning structure for multi-wire cutting machine. BACKGROUND

[0002] With the progress of science and technology and the higher performance index requirement of processing product, the requirement of cutting precision of the customer using multi-wire cutting machine is higher and higher, especially the positioning requirement of cutting piece reaches ≤1 μm, and the translation workbench for loading workpiece needs to have very high mechanical precision requirement.

[0003] As known from the above, the common multi-wire cutting machine nowadays often includes a translation workbench for loading workpiece and a cutter for cutting workpiece, the translation workbench generally includes a base and a load plate slidingly connected on the mounting seat, the workpiece is specifically loaded on the load plate, the base is fixed on the platform and has a motor and a speed reducer connected with the driving shaft of the motor inside, in addition, a lead screw connected with the driving end of the speed reducer and a nut fixed with the load plate are arranged in the base, the lead screw and the nut are threadedly matched, during work, the lead screw is rotated by the driving of the motor, the load plate is pulled or pushed to translate along the axial direction of the lead screw by the thread cooperation between the lead screw and the nut, and a locking mechanism is used to lock and position the nut, which is a very common structure in the field of cutting machine.

[0004] However, according to the foregoing requirements, the current structure cannot actually meet the high-precision requirement, because: during the transmission process of the cooperation between the lead screw and the nut, the cooperation between the lead screw and the nut is not completely tight, and the long-time cooperation between the lead screw and the nut will cause the wear of the thread, which will eventually cause the gap between the lead screw and the nut, and the inertial force possessed by the nut when the locking mechanism locks the nut will cause the deviation of the moving amount of the nut and the load plate fixed with the nut, the positioning accuracy is poor, which seriously affects the subsequent cutting precision. SUMMARY

[0005] The utility model aims at the above problems existing in prior art, and proposes a high-precision translation positioning structure for multi-wire cutting machine, and the technical problem to be solved by the utility model is: how to improve the positioning accuracy.

[0006] The utility model discloses a high-precision translation positioning structure for multi-wire cutting machine, which comprises a base with a cavity, a carrier plate slidingly connected to the base, a driving device connected to the base, a screw rod fixedly connected to the driving end of the driving device in the cavity, and a nut assembly extending into the cavity and screwing with the screw rod.

[0007] The high-precision translation positioning structure for multi-wire cutting machine is characterized in that it comprises elastic member one and elastic member two, both of which are sleeved outside the screw rod and located on both sides of the nut assembly. Elastic member one is axially abutted on one side of the nut assembly, and elastic member two is axially abutted on the other side of the nut assembly.

[0008] In the high-precision translation positioning structure for a multi-wire cutting machine, the base has a front end and a rear end, the cavity penetrates through the front and rear ends of the base, the driving device is located at the front end of the cavity, the front end of the cavity is provided with a ring-shaped front limiting cover, the front limiting cover is fixedly connected to the driving device and is arranged opposite to the connecting seat, the rear end of the cavity is provided with a ring-shaped rear limiting cover, and the rear limiting cover is fixedly connected to the base, the screw nut assembly comprises a connecting seat fixedly connected to the carrier plate and a screw nut fixedly connected to the connecting seat, the screw rod is screwed with the screw nut, the elastic member one elastically acts between the front limiting cover and the connecting seat, and the elastic member two elastically acts between the rear limiting cover and the connecting seat. Specifically, the driving device can adopt the prior art, that is, a servo motor and a harmonic reducer, the two are connected through a shaft coupling, the servo motor is fixed on the base through bolts (screws) and the harmonic reducer is connected to the front end of the screw rod, so that the transmission is realized to control the rotation of the screw rod, the positioning stability of the elastic member one and the elastic member two is ensured through the arrangement of the front limiting cover and the rear limiting cover, and the front limiting cover and the rear limiting cover are both arranged in a ring shape, which is beneficial to the arrangement of the screw rod and reduces unnecessary interference. In addition, the screw nut assembly is composed of two parts of the connecting seat and the screw nut in a split type, so as to realize the connection and fixation between the screw nut assembly and the carrier plate, ensure the firmness of the structure of the screw nut assembly, realize the detachable replacement of the parts, and reduce the maintenance cost.

[0009] In the high-precision translation positioning structure for a multi-wire cutting machine, a limiting groove one is arranged on one side of the connecting seat in a circumferential direction, a ring-shaped limiting groove two is arranged on the front limiting cover, one end of the elastic member one is embedded in the limiting groove one, and the other end is embedded in the limiting groove two. Through the arrangement of the limiting groove one and the limiting groove two, the two ends of the elastic member one are positioned to prevent deviation during deformation.

[0010] In the high-precision translation positioning structure for a multi-wire cutting machine, a ring-shaped limiting groove three is arranged on the other side of the connecting seat, a ring-shaped limiting groove four is arranged on the rear limiting cover in a circumferential direction, one end of the elastic member two is embedded in the limiting groove three, and the other end is embedded in the limiting groove four. Through the arrangement of the limiting groove three and the limiting groove four, the two ends of the elastic member two are positioned to prevent deviation during deformation.

[0011] In the high-precision translation positioning structure for a multi-wire cutting machine, the bottom of the connecting seat is screwed and locked on the plate surface of the carrier plate by fasteners, and a connecting channel is formed in the connecting seat along the axial direction of the lead screw, and the lead screw nut is inserted into the connecting channel and screwed and locked on the connecting seat by fasteners at one end. Specifically, the bottom of the connecting seat is screwed and positioned on the carrier plate by bolts (screws) to ensure firm connection between the two, and the connecting channel is provided to screw and fix the lead screw nut on the connecting seat by bolts (screws) after being inserted therein, so that the lead screw nut and the connecting seat are firmly connected.

[0012] In the high-precision translation positioning structure for a multi-wire cutting machine, a clearance is formed in the bottom of the base along the axial direction of the lead screw, and the connecting seat extends into the cavity through the clearance. The clearance is provided to ensure that the arrangement of the connecting seat, i.e. the lead screw nut (i.e. the nut assembly), does not interfere, and the clearance is long and strip-shaped, which can ensure the movement space of the nut assembly, thereby ensuring the movement range of the carrier plate.

[0013] In the high-precision translation positioning structure for a multi-wire cutting machine, outer guide rails parallel to the lead screw are fixed on both sides of the carrier plate, and inner guide rails parallel to the lead screw are fixed on both sides of the bottom of the base, and a plurality of balls are connected between the outer guide rails and the inner guide rails. The inner guide rails, the outer guide rails and the balls cooperate to guide the movement of the carrier plate.

[0014] In the high-precision translation positioning structure for a multi-wire cutting machine, a grating ruler is connected to one side of the carrier plate on the base, and the grating ruler is connected to the carrier plate, and a displacement sensor is connected to the rear end of the carrier plate. The grating ruler and the displacement sensor are prior art and are connected to the controller on the cutting machine, wherein the grating ruler generally includes a ruler grating and a reading head, wherein the ruler grating is fixed on the base, the reading head is fixed on the base, and the output sine wave signal is used to determine the output value of the actuator composed of the driving device, the lead screw and the nut assembly, and the displacement sensor is used to correct the deviation between the grating ruler data and the actual value.

[0015] Compared with the prior art, the high-precision translation positioning structure for a multi-wire cutting machine has the following advantages:

[0016] The elastic members one and two are used to elastically abut against both sides of the nut assembly, so as to ensure that the nut assembly is balanced on the lead screw, and the elastic force generated when the two members are stretched and contracted ensures the positioning of the nut assembly, prevents the existence of gaps and inertial force from causing inaccurate positioning of the carrier plate, maximizes the positioning accuracy of the carrier plate, and ensures the machining precision. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the structural schematic view of the high-precision translation positioning structure for the multi-wire cutting machine.

[0018] Figure 2 is the side view of the high-precision translation positioning structure for the multi-wire cutting machine.

[0019] Figure 3 is Figure 2 is the sectional view along the direction A-A in the high-precision translation positioning structure.

[0020] Figure 4 is Figure 3 is the local enlarged view of A in the high-precision translation positioning structure.

[0021] Figure 5 is Figure 3 is the local enlarged view of B in the high-precision translation positioning structure.

[0022] Figure 6 is Figure 2 is the sectional view along the direction B-B in the high-precision translation positioning structure.

[0023] Figure 7 is the structural schematic view of the base.

[0024] Figure 8 is the structural schematic view of the carrier plate.

[0025] Figure 9 is the structural schematic view of the nut assembly.

[0026] Figure 10 is the structural schematic view of the front limit cover.

[0027] Figure 11 is the structural schematic view of the rear limit cover.

[0028] In the figure, 1, base; 11, cavity; 111, rear limit cover; 1111, limit slot four; 12, driving device; 121, front limit cover; 1211, limit slot two; 13, screw rod; 14, accommodation opening; 15, inner guide rail; 2, carrier plate; 21, outer guide rail; 22, displacement sensor; 3, elastic member one; 4, elastic member two; 5, ball; 6, grating ruler; 7, nut assembly; 71, connecting seat; 72, screw nut; 711, limit slot one; 712, limit slot three; 713, connecting channel. DETAILED DESCRIPTION

[0029] The following is a specific embodiment of the present application and further describes the technical scheme of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0030] As Figure 1 , Figure 2 , Figure 3 ,Figure 4 、 Figure 5 、 Figure 7 and Figure 9 As shown in the figure, the high-precision translation positioning structure for the multi-wire cutting machine includes a base 1, a carrier plate 2, and a fixed plate. The base 1 is in the shape of a cuboid and is arranged horizontally. The top of the base 1 is fixed to the fixed plate by bolts. The carrier plate 2 is in the shape of a rectangular plate and is located at the bottom of the base 1. A cavity 11 is provided in the base 1 and extends through the front and back ends of the base 1. A lead screw 13 is arranged in the cavity 11 along the horizontal direction. A drive device 12 is fixed to the front end of the base 1 by screws. The drive device 12 is a prior art and specifically includes a servo motor and a harmonic reducer connected to the drive end of the servo motor through a shaft coupling. The two are fixed to the front end of the base 1 by screws and make the harmonic reducer extend into the cavity 11 and be in transmission connection with the front end of the lead screw 13.

[0031] A clearance 14 is provided at the bottom of the base 1 along the length direction of the lead screw 13. Figure 8 A screw nut assembly 7 is fixed to the upper surface of the carrier plate 2. Specifically, the screw nut assembly 7 includes a connecting seat 71 and a screw nut 72. The lower end of the connecting seat 71 is fixed to the upper surface of the carrier plate 2 by screws. A connecting channel 713 is provided in the connecting seat 71 along the axial direction of the lead screw 13. The screw nut 72 is arranged in the connecting channel 713 and the outer side wall thereof is in close contact with the inner side wall of the connecting channel 713. The flange end of the screw nut 72 is fixed to one side of the outer wall of the upper end of the connecting seat 71 by screws. The lead screw 13 is in threaded connection with the screw nut 72. The drive device 12 can control the clockwise / counterclockwise rotation of the lead screw 13. When the lead screw 13 rotates clockwise, the carrier plate 2 moves towards the rear end of the lead screw 13. Conversely, when the lead screw 13 rotates counterclockwise, the carrier plate 2 moves towards the front end of the lead screw 13.

[0032] In addition, Figure 6 Two outer guide rails 21 are fixed to the carrier plate 2 on both sides of the base 1 along the axial direction of the lead screw 13 by screws. Two inner guide rails 15 are fixed to the outer walls of the base 1 on both sides along the axial direction of the lead screw 13 by screws. The inner guide rail 15 and the outer guide rail 21 on the same side form a group. A plurality of balls 5 are in rolling connection between the inner guide rail 15 and the outer guide rail 21 of the same group.

[0033] In addition, Figure 10 and Figure 11A front limiting cover 121 in the shape of a ring is fixed on the driving device 12 (harmonic reducer) at the front end of the cavity 11 by screwing, a rear limiting cover 111 in the shape of a ring is arranged at the rear end of the cavity 11 and fixed on the base 1 by screwing, the high-precision translation positioning structure comprises two elastic members arranged in the cavity 11 of the base 1, which are an elastic member one 3 and an elastic member two 4, both of which are sleeved on the lead screw 13 and located on the two sides of the connecting seat 71, a limiting groove one 711 in the shape of a ring is arranged on the side of the connecting seat 71 facing the front limiting cover 121, a limiting groove two 1211 in the shape of a ring is arranged on the side of the front limiting cover 121 facing the connecting seat 71, the elastic member one 3 is elastically applied between the front limiting cover 121 and the connecting seat 71, one end of the elastic member one 3 is embedded in the limiting groove one 711, and the other end of the elastic member one 3 is embedded in the limiting groove two 1211, a limiting groove three 712 is arranged around the lead screw nut 72 on the side of the connecting seat 71 facing the rear limiting cover 111, a limiting groove four 1111 in the shape of a ring is arranged on the side of the rear limiting cover 111 facing the connecting seat 71, the elastic member two 4 is elastically applied between the rear limiting cover 111 and the connecting seat 71, one end of the elastic member two 4 is embedded in the limiting groove three 712, and the other end of the elastic member two 4 is embedded in the limiting groove four 1111, and it is worth mentioning that the elastic member one 3 and the elastic member two 4 are both springs.

[0034] Working principle: It should be pointed out in advance that the fixed plate is used to keep the base 1 positioned, the workpiece to be processed is assembled through the carrier plate 2, the lead screw 13 is driven to rotate clockwise by the driving device 12, the carrier plate 2 drives the workpiece to translate towards the rear end of the base 1 through the cooperation of the lead screw 13 and the lead screw nut 72 and the driving of the connecting seat 71, in this process, the elastic member one 3 is constantly stretched, and the elastic member two 4 is constantly compressed, the elastic force generated by the deformation of the elastic member two 4 in this state counteracts the connecting seat 71 to ensure that the connecting seat 71 and the lead screw nut 72 are positioned, conversely, when the lead screw 13 rotates counterclockwise, the carrier plate 2 drives the workpiece to translate towards the front end of the base 1 through the driving of the connecting seat 71, in this process, the elastic member two 4 is constantly stretched, and the elastic member one 3 is constantly compressed, the elastic force generated by the deformation of the elastic member one 3 in this state counteracts the connecting seat 71 to ensure that the connecting seat 71 and the lead screw nut 72 are positioned, and in the above steps, the movement amount of the carrier plate 2 is determined by the sine wave signal output by the grating ruler 6, the movement amount of the carrier plate 2 and the data of the grating ruler 6 are monitored in real time through the displacement sensor 22, and the actual deviation value of the data of the grating ruler 6 and the movement amount of the carrier plate 2 can be corrected through the monitored values.

[0035] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0036] Although the base 1, the cavity 11, the rear limiting cover 111, the limiting groove four 1111, the driving device 12, the front limiting cover 121, the limiting groove two 1211, the lead screw 13, the let go of mouth 14, the inner guide rail 15, the load plate 2, the outer guide rail 21, the displacement sensor 22, the elastic piece one 3, the elastic piece two 4, the ball 5, the grating ruler 6, the nut assembly 7, the connecting seat 71, the lead screw nut 72, the limiting groove one 711, the limiting groove three 712, the connecting channel 713 and other terms are used more in this paper, but the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the utility model; it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A high-precision translation positioning structure for a multi-wire cutting machine, the multi-wire cutting machine comprising a base (1) having a cavity (11) inside and a carrier plate (2) slidingly connected to the base (1), a driving device (12) being connected to the base (1), a screw rod (13) being provided in the cavity (11) in a horizontal direction and fixed to a driving end of the driving device (12), a nut assembly (7) being connected to the carrier plate (2) and extending into the cavity (11), and the screw rod (13) being screwed with the nut assembly (7), characterized in that, High-precision translation positioning structure includes elastic piece one (3) and elastic piece two (4), the elastic piece one (3) and the elastic piece two (4) are all set in the lead screw (13) outside and are located the nut assembly (7) both sides respectively, the elastic piece one (3) is axially tightly in the nut assembly (7) one side along the lead screw (13), and the elastic piece two (4) is axially tightly in the nut assembly (7) the other side along the lead screw (13).

2. The high precision translation positioning structure for a multi-wire saw according to claim 1, wherein, The nut assembly (7) includes the connecting seat (71) fixed on the carrier plate (2) and the screw nut (72) fixed in the connecting seat (71), the base (1) has front end and rear end, the cavity (11) is through the base (1) front and rear ends, the drive device (12) is located the cavity (11) front end, the cavity (11) front end is equipped with the front limit cover (121) of ring shape, the front limit cover (121) is fixed on the drive device (12) and is opposite with the connecting seat (71) arrangement, the cavity (11) rear end is equipped with the rear limit cover (111) of ring shape, and the rear limit cover (111) is fixed with the base (1), the lead screw (13) is screwed with the screw nut (72), the elastic piece one (3) is elastically acted between the front limit cover (121) and the connecting seat (71), the elastic piece two (4) is elastically acted between the rear limit cover (111) and the connecting seat (71).

3. The high precision translation positioning structure for a multi-wire saw according to claim 2, wherein, The connecting seat (71) one side is along the circumferential direction and is equipped with the limit slot one (711), the front limit cover (121) is equipped with the limit slot two (1211) of ring shape, the elastic piece one (3) one end is embedded in the limit slot one (711), the other end is embedded in the limit slot two (1211).

4. The high precision translation positioning structure for a multi-wire saw according to claim 2, wherein, The connecting seat (71) other side is equipped with the limit slot three (712) of ring shape, the rear limit cover (111) is along the circumferential direction and is equipped with the limit slot four (1111) of ring shape, the elastic piece two (4) one end is embedded in the limit slot three (712), the other end is embedded in the limit slot four (1111).

5. The high precision translation positioning structure for multi-wire saw according to claim 2 or 3 or 4, characterized in that, The connecting seat (71) bottom is locked by fastener and is screwed on the board surface of the carrier plate (2), the connecting seat (71) is along the lead screw (13) and is equipped with the connection channel (713), the screw nut (72) is inserted in the connection channel (713) and one end is screwed and locked by fastener with the connecting seat (71).

6. The high precision translation positioning structure for a multi-wire saw according to claim 5, wherein, The base (1) bottom is along the lead screw (13) and is equipped with the clearance (14) of long strip shape and the cavity (11) intercommunication, the connecting seat (71) is through the clearance (14) and extends into the cavity (11).

7. The high precision translation positioning structure for a multi-wire saw according to claim 6, characterized in that, The carrier plate (2) is fixed with the outer guide rail (21) parallel with the lead screw (13) on both sides of the base (1), the base (1) bottom is fixed with the inner guide rail (15) parallel with the lead screw (13) on both sides, the outer guide rail (21) and the inner guide rail (15) are rotatably connected with a plurality of ball bearings (5).

8. The high precision translation positioning structure for a multi-wire saw according to claim 5, wherein, The base (1) is connected with a grating ruler (6) on one side of the carrier plate (2), and the grating ruler (6) is connected with the carrier plate (2), and the rear end of the carrier plate (2) is connected with a displacement sensor (22).

Images