CN210121715U

CN210121715U - Locking device for die steel cutting

Info

Publication number: CN210121715U
Application number: CN201822236809.0U
Authority: CN
Inventors: 舒丹
Original assignee: Taicang Chenghexin Precision Technology Co Ltd
Current assignee: Taicang Chenghexin Precision Technology Co Ltd
Priority date: 2018-12-28
Filing date: 2018-12-28
Publication date: 2020-03-03
Anticipated expiration: 2028-12-28
Also published as: WO2020134079A1

Abstract

A locking device for die steel cutting machining. The utility model discloses a protruding and cutting platform of locking means lower surface are fixed. And the bulges and the cutting platform are internally provided with an electromagnetic coil and a sensing array respectively. Through the detection of sensing array to solenoid magnetic field intensity, the utility model discloses the position coordinate of the mould steel work piece of processing is treated in the acquisition that can be accurate. Therefore, the workpiece to be machined can be accurately positioned, and the cutting precision is improved.

Description

Locking device for die steel cutting

Technical Field

The utility model relates to a mould steel processing equipment field especially relates to a locking means for mould steel cutting process.

Background

Die steels are commonly used to make cold, hot or pressure die castings which have a high hardness and are therefore not easily machinable. In the cutting process, the cutter is easy to break, the cutting surface is rough, and the requirement of processing precision is difficult to meet.

Because the die steel is high in hardness, a cutting knife acted on the die steel is easy to break or slip and deviate in the cutting process, and the position deviation is easy to generate between the cutting knife or a die steel workpiece to be cut in the cutting process. The existing cutting device has the advantages that the cutting platform can only feed the workpiece to be cut, and the position stability of the workpiece in the cutting process cannot be ensured.

Once the workpiece is displaced from the cutting blade during the cutting process, it is common practice to manually shut down the machine and correct the displacement, or to correct the displacement by adding a robot. However, in the cutting process, it is difficult for the operator to detect the position deviation in time due to the visual interference generated by the electric spark at the cutting point and the action of the electrostatic force and the explosive force generated by the cutting. The cutting precision of the die steel can not meet the requirement through the detection device only after the die steel is cut. Therefore, after cutting, the existing die steel often needs further cutting, milling and grinding processes. The processing efficiency is not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects existing in the prior art, the utility model aims to provide a cutting processing device capable of improving the performance of a cutting surface of die steel.

Firstly, in order to achieve the above purpose, a locking device for die steel cutting processing is provided, which is used for a cutting platform, on which a die steel workpiece to be processed is arranged, and the cutting platform is used for fixing the die steel workpiece to be processed or enabling the workpiece to move on the surface relative to the cutting device; the die steel workpiece to be processed is fixed on the upper surface of the locking device, a protrusion is arranged on the lower surface of the locking device, the locking device is connected with the upper surface of the cutting platform through the protrusion, an electromagnetic coil is arranged at the end part of the lower side of the protrusion, and a protective layer covers the outer side of the electromagnetic coil.

Optionally, in the cutting processing device, magnetic bodies are further distributed in the cutting platform, and the magnetic bodies include electromagnets or permanent magnets or a combination thereof; in a locked state: the electromagnetic coil is changed in the energized state to generate a magnetic field attracting the magnetic body, so that the locking device is attracted by the magnetic body and fixed in the sliding groove.

Optionally, in the cutting processing apparatus, the magnetic pole directions of the magnetic bodies are all perpendicular to the cutting platform, and the magnetic pole directions of the magnetic bodies are the same; the directions of the magnetic fields generated by the electromagnetic coils in the same electrified state are the same.

Optionally, in the cutting device, the directions of the magnetic fields generated by the electromagnetic coils in the two energized states are opposite.

Optionally, in the cutting device, the protective layers coated on the outer side and the lower side of the electromagnetic coil are made of PVC or nitrile rubber.

Optionally, in the cutting device, the hall element is disposed on the bottom surface of the inner wall at the intersection of the sliding grooves

Optionally, in the cutting device, the lower side of each protrusion is connected to at least 2 pairs of electromagnetic coils through a rotating fixing member, the directions of electrodes of the electromagnetic coils are the same when the electromagnetic coils are powered on, and the rotating fixing member is a rotating shaft.

Advantageous effects

The utility model provides a cutting process instrument to mould steel, it is fixed with cutting platform through the arch of locking means lower surface. And the bulges and the cutting platform are internally provided with an electromagnetic coil and a sensing array respectively. Through the detection of sensing array to solenoid magnetic field intensity, the utility model discloses the position coordinate of the mould steel work piece of processing is treated in the acquisition that can be accurate. Therefore, the workpiece to be machined can be accurately positioned, and the cutting precision is improved.

Further, the utility model discloses still can different positions in the cutting platform set up the magnetic substance, through control to above-mentioned solenoid's on state, after the mould steel work piece of treating processing reachs the position that needs, further stabilizes the position of above-mentioned work piece through the appeal between magnetic substance and the solenoid, further reduces the cutting in-process work piece and shifts and the error that causes.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, together with the embodiments of the invention for the purpose of explanation and not limitation of the invention. In the drawings:

fig. 1 is a schematic view of the overall structure of a cutting and machining apparatus according to the present invention;

fig. 2 is a schematic view of the connection relationship between the electromagnetic coil and the cutting platform in the cutting device of the present invention;

FIG. 3 is a schematic diagram of the sliding groove and the sensor array of the cutting platform of the present invention;

fig. 4 is a schematic view of another connection relationship between the electromagnetic coil and the cutting platform in the cutting device of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Fig. 1 is according to the utility model discloses a locking means for mould steel cutting process, it includes:

the cutting platform 1 is provided with a die steel workpiece to be processed, and is used for fixing the die steel workpiece to be processed or enabling the workpiece to move on the surface relative to the cutting device 2;

the cutting device 2 comprises a wire feeding mechanism and a wire electrode, wherein the wire feeding mechanism comprises a plurality of wheel shafts, and the wheel shafts drive the wire electrode to reciprocate or move in a single direction, so that the wire electrode at the position of the cutting tool head moves relative to the die steel workpiece to be processed. In a cutting state, the electrode wire is charged, electric discharge is generated between the electrode wire and a die steel workpiece to be machined, and electrostatic force and explosive force are generated to erode the contact part of the surface of the die steel workpiece to be machined and the electrode wire;

and the protection device 4 is coated outside the cutting device 2 and used for preventing electric sparks or metal scraps from splashing in the cutting process. The inside of the protection device can be also connected with an air supply or liquid supply pipeline, and the liquid supply pipeline sprays liquid to the surface of the workpiece at the cutting part to keep the temperature of the workpiece stable in the cutting process. The gas supply pipeline outputs specific gas to the surface of the workpiece at the cutting part so as to ensure the cutting effect.

The utility model discloses a processingequipment still can further set up locking means 3 on cutting platform. The die steel workpiece to be processed is fixed on the upper surface of the locking device 3, a protrusion is arranged on the lower surface of the locking device 3, the locking device 3 is connected with the upper surface of the cutting platform 1 through the protrusion, an electromagnetic coil 31 is arranged at the end part of the lower side of the protrusion, and a protective layer covers the outer side of the electromagnetic coil 31. In order to match the protrusions, referring to fig. 2, sliding grooves 11 are formed in the upper surface of the cutting platform 1 in a staggered arrangement, the width of each sliding groove 11 is slightly larger than the diameter of each protrusion on the lower surface of the locking device 3, and sensing arrays formed by hall elements 12 are uniformly distributed on the inner wall or the bottom of each sliding groove 11.

Further, as shown in fig. 4, at least 2 pairs of electromagnetic coils 31 are connected to the lower side of each protrusion through a rotating fixing member, the direction of the electrodes of the electromagnetic coils 31 is the same when electricity is supplied, and the rotating fixing member is a rotating shaft. The coils are energized and magnetically repel each other, causing each pair of coils to rotate about the axis of rotation and unroll. This further increases the fixing of the locking device 3 by increasing the contact area between the electrode ring and the inner wall of the upper side of the sliding groove. At this time, it is also possible to arrange that the bottom of the cutting platform 1 is controlled in contact with the open solenoid by the lifting structure 14. In a locked state, the lifting structure 14 controls the bottom of the cutting platform 1 to ascend and abut against the lower surface of the electromagnetic coil, and the upper surface of the electromagnetic coil is fixed by the lifting structure in contact with the inner wall of the upper side of the sliding groove.

In order to realize the adaptive control of the workpiece, the upper portion of the cutting platform 1 may further be provided with a driving unit, the driving unit includes an electromagnetic driving unit or a rotating wheel or a mechanical arm, and the driving unit may drive the locking device 3 to move along the sliding groove 11 on the upper surface of the cutting platform 1.

In order to further increase the locking strength of the locking device 3, a magnetic body 13 may be further arranged in the cutting platform 1 in the manner shown in fig. 2. The magnetic body can be selected as a permanent magnet or an electromagnet driven by a current control circuit.

The cutting processing device also comprises a control unit, wherein the control unit is arranged to realize the control of the position of the workpiece to be processed in the following mode so as to realize accurate cutting:

in use, when the protrusion arranged on the lower surface of the locking device 3 is not inserted into the sliding groove 11 on the upper surface of the cutting platform 1, the control unit collects the magnetic field intensity of each hall element in the sensing matrix, and stores the magnetic field intensity generated by the magnetic body sensed by the control unit according to the position coordinates of each hall element. For example, referring to fig. 3, the hall elements are disposed on the lower surface of the sliding slot 11 to form a 5 × 2 array, the hall elements in the first row and the first column sense the magnetic field generated by the magnetic bodies to generate a magnetic field strength signal, and the magnetic field strength signal is stored in the elements in the first row and the first column in the calibration matrix C generating 5 × 2; magnetic field intensity signals sensed by the Hall elements in the first row and the second column are correspondingly stored in elements in the first row and the second column in the calibration matrix C of 5 x 2, so that the magnetic field intensity of each sampling point in the sensing array is collected to obtain the calibration matrix C;

then, informing an operator to fix the die steel workpiece to be processed on the upper surface of the locking device 3, and inserting a protrusion arranged on the lower surface of the locking device 3 into a sliding groove 11 on the upper surface of the cutting platform 1 after fixing; and setting a target position matrix A by an operator according to the processing requirement of the workpiece. The target position matrix A comprises position coordinates of the workpiece and the cutting depth or time requirement on the position, and aims to keep the workpiece at a certain position for the cutting knife to cut, move the workpiece to the next position after the cutting reaches the required depth or between the required depths, and continue to cut until the machining is finished. The control unit reads a target position matrix A;

the process is started thereafter. In the process, firstly, the control unit controls the electromagnetic coil 31 arranged on the protrusion to be electrified, so that the electromagnetic coil induces a first magnetic field with the strength not exceeding a first field strength, the hall elements distributed on the inner wall or the bottom of the sliding groove 11 induce the first magnetic field, and the sensing array generates and outputs a detection matrix D according to the magnetic field strength induced by the hall elements in a manner similar to that of acquiring and calibrating the matrix C, so that the sensing matrix S = D-C is calculated. By introducing the calibration matrix C, the deviation amount generated by the magnetic body or the first magnetic field in the detection matrix D obtained by direct acquisition can be corrected, and the obtained sensing matrix S only contains a component for marking the coordinate position of the workpiece, so that the judgment on the position of the workpiece is more accurate. The control unit judges whether the distance between the sensing matrix S and the target position matrix A reaches a preset locking threshold value or not, and if the distance exceeds the locking threshold value, the control unit needs to control and drive the workpiece to move to a set position; otherwise, the locking device 3 can be controlled to enter a locking state to cut the workpiece.

Specifically, the manner of driving the workpiece to move to its set position is as follows: calculating a transmission matrix H from the sensing matrix S to the target position matrix A, wherein A = S × H, controlling the driving unit according to the transmission matrix H to enable the locking device 3 to move along the sliding groove 11 on the upper surface of the cutting platform 1, and then continuously evaluating whether the distance between the sensing matrix S and the target position matrix A collected at the new position reaches a preset locking threshold value or not in the above manner until the distance can enter a locking state.

In the locked state, the current supply state of the electromagnetic coil 31 is changed, so that a second magnetic field with the strength reaching a second field strength is induced and generated by the electromagnetic coil 31, the second magnetic field generates attraction force on the magnetic body, and the electromagnetic coil 31 is attracted by the magnetic body and fixed in the sliding groove 11; at this time, the driving unit may cooperatively control the locking device 3 to restrict the locking device 3 from moving along the sliding groove 11 on the upper surface of the cutting deck 1. In this state, the wire moving mechanism drives the wire electrode to move relative to the die steel workpiece to be machined, electric discharge is generated between the wire electrode and the die steel workpiece to be machined, the part, in contact with the wire electrode, of the surface of the die steel workpiece to be machined is corroded to a set position, then the target position matrix A is updated, and the second step to the sixth step are repeated until the cutting of the workpiece is completed.

In the process, the magnetic pole directions of the magnetic bodies are all vertical to the cutting platform 1, and the magnetic pole directions of the magnetic bodies are the same; the directions of the magnetic fields generated by the electromagnetic coils 31 in the same current-carrying state are the same, and the directions of the magnetic fields generated by the same electromagnetic coil 31 in the two current-carrying states are opposite. The field intensity of the first magnetic field is smaller than that of the second magnetic field, the direction of the second magnetic field is the same as that of the magnetic body, and the direction of the first magnetic field is opposite to that of the second magnetic field.

The outer side of the electromagnetic coil 31 can be coated with a protective layer made of PVC material or nitrile rubber material so as to protect the coil from short circuit caused by abrasion of the cutting platform. The PVC material or the nitrile rubber are insulated, so that the coil can be protected from cutting scraps or electric sparks.

In the cutting process, the sensing array can synchronously and periodically acquire data of a sensing matrix S and judge whether the distance between the sensing matrix S and the target position matrix A is maintained within the range of a locking threshold value. And entering a moving state once the threshold value is judged to be exceeded, and stopping the cutting operation on the workpiece: the electromagnetic coil 31 is electrified to induce a magnetic field which can be identified by the Hall element, and the sensing array judges whether the die steel workpiece to be processed reaches a preset position according to the position of the Hall element which induces the magnetic field; when the preset position is not reached, the locking device 3 is controlled to move along the sliding groove 11 on the upper surface of the cutting platform 1 through the driving unit; and when the preset position is reached again, the workpiece enters the locking state again, and the cutting operation of the workpiece is recovered.

The utility model discloses a cutting process device still can further be in with hall element 12 setting the inner wall bottom surface of 11 staggered places of sliding tray, and set up interval between each sliding tray 11 equals, and evenly cuts apart cutting platform 1.

Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A locking device for die steel cutting machining is used for a cutting platform (1) of a die steel workpiece, wherein the cutting platform is used for fixing the die steel workpiece to be machined or enabling the workpiece to move on the surface of the cutting platform relative to a cutting device (2);

it is characterized in that the preparation method is characterized in that,

the die steel workpiece to be processed is fixed on the upper surface of the locking device (3), the lower surface of the locking device (3) is provided with a protrusion, the locking device (3) is connected with the upper surface of the cutting platform (1) through the protrusion, the end part of the lower side of the protrusion is provided with an electromagnetic coil (31), and the outer side of the electromagnetic coil (31) is coated with a protective layer.

2. The locking device for die steel cutting according to claim 1, wherein a magnetic body (13) is further distributed in the cutting platform (1), and the magnetic body comprises an electromagnet or a permanent magnet or a combination thereof;

in a locked state: the electromagnetic coil (31) is changed in the energized state to generate a magnetic field attracting the magnetic body, so that the locking device (3) is attracted by the magnetic body and fixed in the sliding groove (11).

3. The locking device for die steel cutting according to claim 2, wherein the magnetic pole direction of each magnetic body is perpendicular to the cutting platform (1), and the magnetic pole direction of each magnetic body is the same;

the directions of the magnetic fields generated by the electromagnetic coils (31) in the same electrified state are the same.

4. The lock device for die steel cutting process according to claim 2, wherein the magnetic fields generated by the electromagnetic coil (31) in the two energized states are opposite in direction.

5. The locking device for die steel cutting process according to claim 1, wherein the solenoid coil (31) is coated with PVC or nitrile rubber as a protective layer on both the outer side and the lower side.

6. The lock device for die steel cutting processing according to claim 1, wherein at least 2 pairs of electromagnetic coils (31) are connected to the lower side of each protrusion through a rotary fixing member, and the directions of the electrodes of the electromagnetic coils (31) are the same when the electromagnetic coils are energized.

7. The lock for die steel cutting as claimed in claim 1, wherein the rotational fixing member is a rotating shaft.