CN208147073U - EDM in manufacture of tire mould lathe - Google Patents

Abstract

The utility model discloses a tire mold electric discharge machining machine tool, which comprises a machine tool body, and a conductive connecting piece is detachably arranged between the main shaft of the machine tool and the electric spark action end, so as to realize the outward movement of the electric spark action end relative to the center line of the main shaft. Extend to shorten the travel that the machine tool spindle needs to move. The utility model solves the problem that the spindle of the machine tool cannot enter the cavity of the tire mold due to the limitation of the diameter of the top of the tire mold, so that the machine tool cannot complete the fine processing of the cavity surface of the tire mold. The electric spark action end is formed by using the conductive connector. Extend outward without requiring overall movement of the machine tool spindle.

Description

Tire mold EDM machine tool

technical field

The utility model relates to a tire mold electric discharge machining machine tool.

Background technique

Existing tire mold molding processing generally requires EDM to finish the workpiece after rough machining by CNC machine tools. There are often many problems such as machine tool spindle interference pattern block/circle, oversized machine tool spindle and insufficient machine travel.

In order to solve the above problems, the following two methods are often adopted at present:

1. Retrofit the machine tool: increase the stroke of the machine tool through machine tool modification, and modify the spindle structure to avoid interference pattern, but this solution is costly, and it takes a long time for machine tool assembly and accuracy verification, which will prolong the tire The mold processing cycle increases the production cost; and because the individual requirements of the tire mold are too strong, the machine tool after transformation is not universal, resulting in waste and specialization of the machine tool.

2. Divide the mold into blocks: process the pattern ring of the tire mold into blocks. Although this solution can solve the problem of interference patterns, it cannot solve the problem of insufficient machine travel. The pattern block is clamped multiple times, which is time-consuming and labor-intensive, which seriously affects the production efficiency.

Utility model content

In order to solve the above problems, the utility model proposes a tire mold electrical discharge machining machine tool. The utility model has good versatility and effectively solves the technical problem of limited machining capacity of the machine tool.

In order to achieve the above object, the utility model adopts the following technical solutions:

A tire mold electrical discharge machining machine tool, including a machine tool body, a conductive connector is detachably arranged between the main shaft of the machine tool and the end of the electric spark action, so as to realize the outward extension of the end of the electric spark action relative to the center line of the main shaft, so as to shorten the length of the machine tool. The travel that the spindle needs to move.

Further, the machine tool body is provided with a rotary table and a driving device for driving the rotary table to rotate.

Further, the power output end of the driving device is connected to the rotary table through a precision indexing mechanism.

As a preferred solution, the rotary table driving device is preferably a servo motor.

Further, the rotary table tilts backward at a certain angle, the angle is preferably 10-15 degrees; the bed is provided with a column inclined to one side of the bed, and the inclination angle is preferably 10-15 degrees, and the moving beam is installed through the beam The seat is slidably connected to the lateral end face of the column, and the machine tool spindle is rotatably connected to one end of the moving beam through the indexing turntable.

Of course, the technical solution of the present utility model does not require large-scale modification of the original EDM machine tool. The above is only an example of the EDM machine tool, and is not limited to the above-mentioned EDM machine tool. Machine tools of other types or structures are applicable.

Further, the conductive connector includes an electrode connection plate, one end of the electrode connection plate is connected to the electrode, and the other end is fixedly connected to the spindle of the machine tool.

Further, the conductive connector is connected to the machine tool spindle or/and the electrode through a fixture, and the fixture includes a fixture seat and a fixture piece that cooperate with each other.

Furthermore, a central through hole is provided in the center of the main body of the fixture seat, and a circumferential positioning block and an axial positioning block are provided on the end surface of the main body of the fixture seat, and the upper end surface of the circumferential positioning block is higher than the upper end surface of the axial positioning block.

As a preferred solution, the circumferential positioning blocks and the axial positioning blocks are arranged to intersect each other, and a plurality of them are evenly arranged along the circumference of the central through hole.

Further, the center of the main body of the clamp piece is provided with a central through hole, and the end surface of the main body of the clamp piece is provided with a circumferential positioning groove and an axial positioning surface, the circumferential positioning groove is matched with the circumferential positioning block, and the axial positioning surface is matched with the circumferential positioning block. Cooperate with the axial positioning block.

Further, a plurality of positioning holes are provided at both ends of the conductive connector for positioning and fastening the clamp seat and the clamp piece, and the connecting line at the distribution center of each positioning hole is arranged parallel to the extending direction of the conductive connector. Such a design can ensure alignment accuracy.

The fixture seat is matched with the fixture sheet, the circumferential positioning block of the fixture seat is clamped in the circumferential positioning groove of the fixture sheet to limit the circumferential displacement of the fixture sheet, and the axial positioning block of the fixture seat closely fits the axial positioning surface of the fixture sheet To ensure the flatness, the clamp piece is locked on the clamp seat by the locking mechanism.

Further, the conductive connector has a Z-shaped structure, specifically including two ends and a middle part. The two ends are provided with a certain height difference and form a certain angle with the middle part. The included angle is preferably greater than Or it is equal to 90 degrees, and the two ends are preferably arranged in parallel; the bending part of the conductive connector is provided with reinforcing ribs to avoid tremors and thermal deformation during the working process of the connecting plate.

Further, the conductive connector has a straight structure. The end face of the inline structure is provided with reinforcing ribs.

Preferably, the conductive connecting piece is made of aluminum material, and its thickness is preferably 20-25mm. The connecting plate body is suitable for clamping electrodes with a weight of less than 1kg. The influence is small; the connecting plate body can also be made of steel material, and its thickness is preferably 10-15 mm. The connecting plate body is suitable for clamping electrodes with a weight greater than or equal to 1 kg, and has the advantages of high strength and good stability.

Compared with the prior art, the beneficial effects of the utility model are:

1. Solve the problem that due to the limitation of the tire mold top diameter, the machine tool spindle cannot enter the tire mold cavity, resulting in the machine tool being unable to complete the fine machining of the tire mold cavity surface. The travel direction of the electric spark action end is formed by using conductive connectors Outward extension without the overall movement of the machine tool spindle;

2. Due to the limitation of the height of the ribs on the surface of the tire mold cavity and/or the inclination angle of the side, the spindle of the machine tool enters the cavity of the tire mold and interferes with the rotary table, process board and/or ribs of the machine tool, resulting in the failure of the machine tool to complete Technical issues of fine machining of tire mold cavity surface;

3. The machine tool is equipped with different forms of conductive connecting plates for different working conditions, which further expands the processing range of the machine tool and solves the technical problem of limited processing capacity and processing range of ordinary EDM machines;

4. During the use of the conductive connecting plate, the quick-change fixture is used for clamping, and the machine is aligned in advance. The operation is simple and fast, ensuring the clamping accuracy and improving the clamping efficiency;

5. Through the detachable connection of the conductive connecting plate, universality is realized, which has high versatility, and at the same time, the cost of machine tool transformation is saved.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

Fig. 1 is a schematic diagram of the structure of the electric discharge machining machine tool;

Figure 2(a) is a schematic diagram of the interference between the spindle and the rotary machine tool;

Figure 2(b) is a schematic diagram of the spindle interference pattern block/ring problem;

Figure 2(c) is a schematic diagram of the problem of insufficient spindle travel;

Figure 2(d) is a schematic diagram of the problem that the spindle size is too large to enter the cavity surface;

Fig. 3 (a), Fig. 3 (b) are the structural representations of Z-shaped connecting plate;

Figure 4(a)-Figure 4(c) is a schematic diagram of the use of the Z-shaped connecting plate;

Fig. 5 (a), Fig. 5 (b) are the structural representations of in-line connecting plate;

Fig. 6 is a schematic diagram of the use of a straight connecting plate;

Fig. 7 is a schematic diagram of the structure of the fixture sheet;

Figure 8(a) and Figure 8(b) are schematic diagrams of the structure of the fixture seat;

Figure 8(c) is a schematic diagram of the pull rod;

Figure 8 (d) is a schematic diagram of the cooperation of the clamp seat and the clamp sheet;

Among them: 1. Column, 2. Moving beam, 3. Machine tool spindle, 4. Pattern block/circle, 5. Process plate, 6. Bed, 7. Positioning hole, 8. End, 9. Middle part, 10. Rib, 11, first included angle, 12, second included angle, 13, conductive connector, 14, circumferential positioning groove, 15, axial positioning surface, 16, central through hole, 17, circumferential positioning block, 18, axial positioning block, 19, rotary table, 20, fixture seat, 21, fixture sheet.

Detailed ways:

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom" etc. indicate The orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only a relative term determined for the convenience of describing the structural relationship between the various components or elements of the present utility model, and does not specifically refer to any component or element in the present utility model, and cannot It should be understood as a limitation of the present utility model.

In the present utility model, terms such as "fixed", "connected" and "connected" should be understood in a broad sense, which means that they can be fixedly connected, integrally connected or detachably connected; they can be directly connected or connected through Intermediaries are indirectly connected. For relevant researchers or technicians in the field, the specific meanings of the above terms in the present utility model can be determined according to specific situations, and should not be construed as limitations on the present utility model.

As introduced in the background technology, in the prior art, the processing spindle of the electric discharge machine tool interferes with the rotary table 19 of the machine tool and the pattern block/circle 4, the size of the machine tool spindle 3 is too large, and the stroke of the machine tool is insufficient. In order to solve the above technology Problem, this application proposes a tire mold EDM machine tool.

As shown in Figure 1, the tire mold EDM machine tool specifically includes a bed 6, a rotary table 19 is arranged on the bed 6, and a driving device for driving the rotary table 19 to rotate, and the driving device for the rotary table 19 is preferably a servo motor. The power output end of the motor is connected to the rotary table 19 through a precision indexing mechanism. The rotary table 19 tilts backward at a certain angle, preferably 10-15 degrees; The inclined column 1 preferably has an inclination angle of 10 to 15 degrees. The movable beam 2 is slidably connected to the lateral end face of the column 1 through the beam mounting seat, and the machine tool spindle 3 is connected to one end of the movable beam 2 through an indexing turntable.

Of course, only one machine tool structure is provided in this embodiment, and the machine tool can be replaced with products of other structures in other embodiments.

As shown in Figure 2(a)-Figure 2(d), during the use of the above-mentioned tire mold EDM machine tool, there may be some problems in the processing of some pattern blocks, such as the interference between the main shaft and the rotary table 19 of the machine tool, the main shaft Interference pattern block/circle 4. There are many problems such as insufficient spindle stroke or the overall spindle cannot enter the cavity surface due to the large size of the spindle.

In order to solve the above problems, the machine tool spindle 3 is detachably connected with a conductive connector 13, which is preferably an electrode connection plate, one end of which is connected to the machine tool spindle 3, and the other end is connected with an electrode.

It should be noted that the conductive connector 13 is not necessarily limited to a plate-like structure. In other embodiments, the conductive connector 13 may be in the shape of a block or a column, which can be designed by those skilled in the art according to specific working conditions, and will not be described here. repeat.

The electrode connection plate includes a connection plate body, and the connection plate body is fixedly connected to the electrode and/or the machine tool spindle 3 through a clamp; as a preferred solution, the clamp includes a clamp seat 20 and a clamp sheet 21, as shown in Figure 8 (a) and Figure 8 ( As shown in b), the fixture seat 20 includes a fixture seat main body, a central through hole 16 is arranged in the center of the main body of the fixture seat 20, a circumferential positioning block 17 and an axial positioning block 18 are arranged on the end surface of the main body of the fixture seat 20, and the circumferential positioning block The upper end surface of 17 is higher than the upper end surface of the axial positioning block 18; the circumferential positioning block 17 and the axial positioning block 18 are preferably arranged to intersect with each other, and are uniformly arranged in multiples (four in the figure) along the circumferential direction.

As shown in Figure 7, the clamp piece 21 includes a main body of the clamp piece 21, a central through hole 16 is arranged in the center of the main body of the clamp piece 21, and a circumferential positioning groove 14 and an axial positioning surface 15 are arranged on the end surface of the main body of the clamp piece 21. The positioning groove 14 cooperates with the circumferential positioning block 17 , and the axial positioning surface 15 cooperates with the axial positioning block 18 .

One end of the connecting plate body is fixedly connected with a fixture seat 20, which can cooperate with the fixture sheet 21 fixedly connected with electrodes, and the circumferential positioning block 17 of the fixture seat 20 is clamped in the circumferential positioning groove 14 of the fixture sheet 21. The two sides of the circumferential positioning block 17 of the seat 20 are in close contact with the two sides of the circumferential positioning groove 14 of the fixture piece 21 to limit the circumferential displacement of the fixture piece 21. 15 closely fit to ensure flatness, and the clamp piece 21 is locked on the clamp seat 20 by a locking mechanism.

The locking mechanism preferably includes a pull rod, one end of the pull rod is provided with a cylindrical positioning block, and the positioning block is clamped in the through hole 16 of the clamp sheet 21, and the other end of the pull rod passes through the through hole 16 to connect the clamp sheet 21 with the clamp. Seat 20 is fixedly connected.

It should be noted that, in other embodiments, the clamp may be a connecting bolt or other connecting member, which can be designed by those skilled in the art according to specific working conditions, so details are not repeated here.

The other end of the connecting plate body is fixedly connected with a fixture piece 21, which can be matched with the fixture seat 20 arranged on the machine tool spindle 3, and the connecting plate body and the machine tool spindle 3 are fixed by the fixture piece 21 and the fixture seat 20 Connection: multiple positioning holes 7 are preferably provided at both ends of the connecting plate body, and the clamp seat 20 and the clamp piece 21 are positioned and fastened by connecting bolts. Parallel setting is used to ensure alignment accuracy.

The connecting plate body can be made of aluminum material, and its thickness is preferably 20-25mm. The connecting plate body is suitable for clamping electrodes with a weight less than 1kg. It has the advantages of light weight and good stability, and has no impact on the load and accuracy of the three heads of the machine tool spindle. Small; the connecting plate body can also be made of steel material, and its thickness is preferably 10-15 mm. The connecting plate body is suitable for clamping electrodes with a weight greater than or equal to 1 kg, and has the advantages of high strength and good stability.

Of course, according to specific application conditions, those skilled in the art can replace the material of the connecting plate or modify its parameters, which are all simple replacements.

In order to adapt to different working conditions, the connecting plate body is divided into the following two types:

The Z-shaped connecting plate body shown in Figure 3 (a) and Figure 3 (b) specifically includes three parts, namely two end parts 8 and a middle part 9; There is a height difference and a certain angle (the first angle 11, the second angle 12) is formed with the middle part 9, the angle is preferably greater than or equal to 90 degrees, and the two ends 8 are preferably arranged in parallel (ie the first angle 12). The included angle 11 is equal to the second included angle 12); the bending part of the connecting plate body is provided with reinforcing ribs 10, so as to avoid tremor and thermal deformation of the connecting plate body during the working process.

It should be noted that the length of the end portion 8 and the middle portion 9 and the angle between the two need to be selected according to the specific structure of the workpiece to be processed, and those skilled in the art can design according to specific working conditions. I won't go into details.

As shown in Figure 5(a) and Figure 5(b), the inline-shaped connecting plate body is a flat plate, and the end surface of the connecting plate body is provided with reinforcing ribs 10.

Specific application examples include the following:

Embodiment one:

The machine tool is used alone without conductive connectors, as shown in Figure 1, and the specific process will not be repeated here;

Embodiment two

The processing range of the machine tool can be further expanded by configuring different forms of electrode connection plates, and the usage method is as follows:

(1) Fix the clamp piece 21 of the electrode connection plate on the clamp seat 20 of the electric discharge machine with a pull bar, then fix the clamp piece 21 on one end of the electrode connection plate, and connect the other end of the electrode connection plate with another clamp seat 20 fixed connection;

(2) Perform alignment outside the machine to verify whether the accuracy of the fixture seat 20 of the electrode connecting plate is consistent with that of the electric discharge machine tool;

(3) The electrode connection plate is fixedly connected on the machine tool spindle, and the clamp piece 21 processing mold with the electrode is installed on the clamp seat 20 of the electrode connection plate until the limited pattern processing is completed;

When the machine tool is equipped with a Z-shaped electrode connection plate, it is mainly suitable for the following working conditions:

As shown in Figure 2 (a) and Figure 2 (b); the tire mold cavity surface needs to be finely processed, and due to the limitation of the inclination angle of the rib side and/or the height of the rib, the machine tool spindle 3 enters the inside of the tire mold cavity and Swinging at a certain angle, the machine tool spindle 3 will interfere with the machine tool table, process plate 5 and/or ribs, causing the machine tool to be unable to complete the fine machining of the tire mold cavity surface; as shown in Figure 4 (a) and Figure 4 ( As shown in b), a Z-shaped electrode connection plate can be installed on the machine tool spindle 3, which can increase the working height of the machine tool spindle 3 and shorten the X-axis stroke of the machine tool spindle 3 (moving the machine tool spindle 3 out of the workbench, process plate 5, mold Cavity surface), effectively solve the above technical problems.

As shown in Figure 2(c) and Figure 2(d); due to the limitation of the tire mold top diameter (too small), the Z-axis travel of the machine tool spindle 3 is insufficient and/or the machine tool spindle 3 (too large) cannot enter the tire mold type inside the cavity, the machine tool cannot complete the fine machining of the tire mold cavity surface; as shown in Fig. , while shortening the X-axis travel of the machine tool spindle 3 (moving the machine tool spindle 3 out of the tire mold cavity), effectively solving the above-mentioned technical problems.

Embodiment three

The machine tool is equipped with a straight electrode connection plate, which is mainly suitable for the following working conditions:

As shown in Figure 2(d), due to the limitation of tire mold crown diameter (too small), the machine tool spindle 3 (too large) cannot enter the tire mold cavity, resulting in the machine tool being unable to complete the fine machining of the tire mold cavity surface. During processing, a straight electrode connection plate is installed on the machine tool spindle 3, as shown in Figure 6, which can shorten the X-axis stroke of the machine tool spindle 3 (moving the machine tool spindle 3 out of the tire mold cavity), effectively solving the above technical problems.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (10)

1. a kind of EDM in manufacture of tire mould lathe, including machine body, machine tool chief axis, feature are provided on machine body It is：It is detachably provided with conducting connecting part between the machine tool chief axis and electric spark effect end, realizes that electric spark effect end is opposite In extending outwardly for spindle centerline.

2. a kind of EDM in manufacture of tire mould lathe as described in claim 1, it is characterized in that：The conducting connecting part is electricity Pole connecting plate, electrode connecting plate one end are connect with electrode, and the other end is connected with machine tool chief axis.

3. a kind of EDM in manufacture of tire mould lathe as described in claim 1, it is characterized in that：The conducting connecting part passes through Fixture is connected with machine tool chief axis or/and electrode, and fixture includes mutually matched clamping fixture seat and clamp sheet.

4. a kind of EDM in manufacture of tire mould lathe as claimed in claim 2, it is characterized in that：The setting of clamping fixture seat main center There is central through hole, circumferentially positioned piece and axially position block, and circumferentially positioned piece of upper surface height are provided on clamping fixture seat main body end face In axially position block upper surface；

Further, described circumferentially positioned piece and axially position block intersect arrangement, and all set along central through hole even circumferential It is equipped with multiple.

5. a kind of EDM in manufacture of tire mould lathe as claimed in claim 4, it is characterized in that：

Clamp sheet main center is provided with central through hole, and clamp sheet main body is provided with circumferentially positioned slot and axially position on end face Face, the circumferentially positioned slot are matched with circumferentially positioned piece, and axial locating surface is matched with axially position block.

6. a kind of EDM in manufacture of tire mould lathe as claimed in claim 3, it is characterized in that：The two of the conducting connecting part End is provided with multiple location holes, with positioning and fastening clips seat and clamp sheet, the line and conduction of both ends location hole distribution center Connector extending direction is arranged in parallel.

7. a kind of EDM in manufacture of tire mould lathe as claimed in claim 5, it is characterized in that：Clamping fixture seat and clamp sheet match It closes, circumferentially positioned piece of clamping fixture seat is arranged in the circumferentially positioned slot of clamp sheet to limit the circumferentially displaced of clamp sheet, clamping fixture seat axis Guarantee flatness is fitted closely to locating piece and clamp sheet axial locating surface, clamp sheet is lock by clamping fixture seat by retaining mechanism On.

8. a kind of EDM in manufacture of tire mould lathe as described in claim 1, it is characterized in that：The conducting connecting part is Z Font structure, specifically includes two ends and middle section, two ends be provided with certain difference in height and with middle section shape At there is certain angle.

9. a kind of EDM in manufacture of tire mould lathe as described in claim 1, it is characterized in that：The conducting connecting part is one Font structure.

10. a kind of EDM in manufacture of tire mould lathe as described in claim 1, it is characterized in that：It is arranged on conducting connecting part There is reinforcing rib.