CN221833500U - An auxiliary fixture for cutting steel bars in EDM machine tool - Google Patents

Abstract

The utility model discloses an auxiliary clamp for cutting ribs and cutting knives in electric spark machine tool processing, which belongs to the technical field of machinery, and comprises a base, wherein a connecting rod clamped with a chuck of a spark machine is fixedly arranged on the top surface of the base, a carrier plate is sleeved on the connecting rod, a driving assembly is arranged on one side of the carrier plate far away from the base, an electrode seat is rotatably connected inside the base, a plurality of electrodes penetrate through the base from the lower end of the electrode seat and are arranged in an annular equidistant manner; the electrode seat is in transmission connection with the driving component through a synchronous belt. According to the utility model, the structure of the existing spark machine clamp is improved, the electrode seat provided with a plurality of electrodes is arranged in the base, and the electrode seat is driven to rotate by the driving assembly, so that the plurality of electrodes can coaxially rotate with a workpiece to be processed, and then the connecting ribs on the workpiece to be processed are cut off.

Description

An auxiliary fixture for cutting steel bars in EDM machine tool

Technical Field

The utility model relates to the technical field of machinery, and more specifically to an auxiliary clamp for cutting steel bars in an electric spark machine tool.

Background Art

Machine tool refers to a machine that manufactures machines, also known as a machine tool or machine tool, and is usually referred to as a machine tool. The machinery industry usually uses gray cast iron with good wear resistance and shock absorption to manufacture the machine tool body. Machine tools are generally divided into metal cutting machine tools, forging machine tools, and woodworking machine tools. All parts with high precision requirements and fine surface roughness requirements generally need to be finally processed on machine tools by cutting methods. Machine tools play a major role in the construction of national economic modernization.

The cutting process of machine tools is achieved by the relative movement between the tool and the workpiece, and its movement can be divided into two categories: surface forming movement and auxiliary movement.

Surface forming motion is the motion that enables the workpiece to obtain the required surface shape and size, which includes main motion, feed motion and cutting motion. The main motion is the motion that plays the main role in stripping excess material from the workpiece blank. It can be the rotational motion of the workpiece (such as turning), linear motion (such as planing on a gantry planer), or the rotational motion of the tool (such as milling and drilling) or linear motion (such as slotting and broaching); the feed motion is the motion in which the tool and the part to be processed of the workpiece move toward each other so that the cutting can continue, such as the movement of the tool holder slide along the machine tool guide rail when turning the outer circle; the cutting motion is the motion that makes the tool cut into the workpiece surface to a certain depth. Its function is to cut a certain thickness of material from the workpiece surface in each cutting stroke, such as the lateral cutting motion of the small tool holder when turning the outer circle.

Auxiliary movements mainly include the rapid approach and withdrawal of the tool or workpiece, adjustment of the position of machine tool components, workpiece indexing, tool holder rotation, material feeding, starting, speed change, reversing, stopping and automatic tool changing.

The indicators for evaluating the technical performance of machine tools can ultimately be attributed to machining accuracy and production efficiency. Machining accuracy includes the dimensional accuracy, shape accuracy, position accuracy, surface quality of the workpiece being machined and the accuracy retention of the machine tool. Production efficiency involves cutting processing time and auxiliary time, as well as the degree of automation and working reliability of the machine tool. On the one hand, these indicators depend on the static characteristics of the machine tool, such as static geometric accuracy and rigidity; on the other hand, they are more related to the dynamic characteristics of the machine tool, such as motion accuracy, dynamic rigidity, thermal deformation and noise.

The EDM machine is an electric pulse processing device used for EDM. It is widely used in the manufacture of various metal molds and mechanical equipment. It is mainly used to process molds and parts with complex holes and cavities; process various conductive materials, deep and fine holes, special-shaped holes, deep grooves, etc., as well as various forming tools, templates, thread ring gauges and other tools. When the spark machine is working, a pulse power supply is added between the electrode and the workpiece. When an electric pulse appears, a spark discharge is generated between the two electrodes. The electro-erosion effect generated by the pulse discharge between the two electrodes is used to remove the conductive material for processing.

In actual production, the electrode is often installed on the spark machine chuck through a fixture (i.e., the spark machine chuck). The spark machine chuck is used to clamp different electrodes in the discharge machining to improve the machining accuracy. It can conduct electricity and also play a role of strong clamping. It is a necessary accessory for discharge machining. Traditional electric pulse clamps are all single-electrode for discharge machining. When cutting the connecting ribs of the workpiece, the spark machine chuck needs to drive the clamp to change the circumferential discharge position, and the machining efficiency is low. Therefore, how to provide an efficient auxiliary fixture that is convenient for the spark machine to cut the ribs is particularly important. In view of this, we propose an auxiliary fixture for cutting the ribs in the EDM machine.

Utility Model Content

1. Technical problems to be solved

The utility model aims to provide an auxiliary fixture for cutting steel bars in an electric spark machine tool, so as to solve the problems raised in the above-mentioned background technology.

2. Technical solution

An auxiliary fixture for cutting steel bars in an electric spark machine comprises a base, a connecting rod fixedly arranged on the top surface of the base and clamped with a chuck of the spark machine, a carrier plate sleeved on the connecting rod, a driving assembly arranged on the side of the carrier plate away from the base, an electrode holder rotatably connected inside the base, a plurality of electrodes connected to the lower end of the electrode holder passing through the base, and the plurality of electrodes are arranged in a ring with equal spacing;

The electrode seat is transmission-connected to the driving assembly via a synchronous belt.

Preferably, the driving assembly is composed of a servo motor and a driving wheel, the output shaft of the servo motor is passed through the carrier plate, and the driving wheel is sleeved on the output shaft of the servo motor.

Preferably, the electrode seat is of a conical structure, the small end of the electrode seat passes through the base and is connected to a plurality of electrodes, the large end of the electrode seat is sleeved with a driven wheel, and the driven wheel is connected to the driving wheel through a synchronous belt passing through the base.

Preferably, a clamping platform is provided in the middle of the electrode seat, and balls connected in series through a retaining frame are provided between the clamping platform and the inner cavity of the base, and the balls are in rolling contact with the clamping platform and the inner cavity of the base.

Preferably, the electrode is inserted into the bottom of the electrode holder and fixed by bolts.

3. Beneficial effects

Compared with the prior art, the advantages of the present invention are:

The utility model improves the structure of the existing spark machine fixture, arranges an electrode holder with a plurality of electrodes inside the base, and drives the electrode holder to rotate through a driving component, so that the plurality of electrodes can rotate coaxially with the workpiece to be processed, and then cuts off the connecting ribs on the workpiece to be processed. Compared with the traditional single electrode processing method of performing turnover rib cutting, the utility model has high rib cutting efficiency and stable current consumption, which is conducive to market promotion.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic top view of the overall structure of an auxiliary fixture for cutting steel bars on an EDM machine tool according to the present invention;

FIG2 is a bottom view of the overall structure of an auxiliary fixture for cutting steel bars on an EDM machine tool according to the present invention;

FIG3 is a schematic cross-sectional view of the overall structure of an auxiliary fixture for cutting a rib in an EDM machine tool according to the present invention;

FIG4 is a schematic diagram of the partial structural disassembly of an auxiliary fixture for cutting a rib with an electric spark machine tool according to the utility model;

Explanation of the numbers in the figure: 1. base; 2. connecting rod; 3. carrier plate; 4. driving assembly; 5. electrode seat; 6. electrode; 7. synchronous belt;

401, servo motor; 402, driving wheel;

501, driven wheel; 502, clamping platform; 503, retaining frame; 504, ball bearing.

DETAILED DESCRIPTION

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set/connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

Please refer to Figures 1-4, the utility model provides a technical solution:

An auxiliary fixture for cutting steel bars in an electric spark machine comprises a base 1, a connecting rod 2 which is fixedly mounted on the top surface of the base 1 and is clamped with a chuck of the spark machine, a carrier plate 3 is sleeved on the connecting rod 2, a driving assembly 4 is arranged on the side of the carrier plate 3 away from the base 1, an electrode holder 5 is rotatably connected inside the base 1, and a plurality of electrodes 6 are connected to the lower end of the electrode holder 5 which passes through the base 1 and is arranged in a ring with equal spacing;

The electrode holder 5 is connected to the driving assembly 4 through a synchronous belt 7. The utility model improves the structure of the existing spark machine fixture, arranges the electrode holder 5 with a plurality of electrodes 6 inside the base 1, and drives the electrode holder 5 to rotate through the driving assembly 4, so that the plurality of electrodes 6 can rotate coaxially with the workpiece to be processed, and then cuts off the connecting ribs on the workpiece to be processed. Compared with the traditional single electrode processing method of performing turnover rib cutting, the utility model has high rib cutting efficiency and stable current consumption, which is conducive to market promotion.

Specifically, as shown in FIG. 2 and FIG. 3 , the driving assembly 4 is composed of a servo motor 401 and a driving wheel 402 . The output shaft of the servo motor 401 is passed through the carrier plate 3 , and the driving wheel 402 is sleeved on the output shaft of the servo motor 401 .

Further, as shown in Fig. 3 and Fig. 4, the electrode holder 5 is in a conical structure, the small end of the electrode holder 5 passes through the base 1 and is connected to a plurality of electrodes 6, the large end of the electrode holder 5 is sleeved with a driven wheel 501, and the driven wheel 501 is connected to the driving wheel 402 through a synchronous belt 7 passing through the base 1. The electrode holder 5 in a conical structure in the utility model can maintain contact with the inner cavity of the base 1 under the action of gravity, which not only increases the area of electricity and improves the amount of electricity, but also ensures the stability of the amount of electricity of the electrode holder 5, avoiding the problem of unstable electricity connection during the rotation of the electrode holder 5.

It is worth noting that a clamping platform 502 is provided in the middle of the electrode holder 5, and a ball 504 connected in series through a retaining frame 503 is provided between the clamping platform 502 and the inner cavity of the base 1, and the ball 504 is in rolling contact with the clamping platform 502 and the inner cavity of the base 1. The utility model also provides a ball structure between the clamping platform 502 and the inner cavity of the base 1, and it is worth noting that the gap in this part can be filled with conductive lubricant to improve the stability of power supply and avoid the problem of increased friction resistance of the electrode holder 5 under the action of gravity.

It is worth noting that the electrode 6 is inserted through the bottom of the electrode holder 5 and fixed by bolts.

The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims (5)

1. An auxiliary fixture for cutting steel bars in an electric spark machine, comprising a base (1), a connecting rod (2) fixedly provided on the top surface of the base (1) and clamped with a chuck of the spark machine, characterized in that: a carrier plate (3) is sleeved on the connecting rod (2), a driving assembly (4) is provided on the side of the carrier plate (3) away from the base (1), an electrode holder (5) is rotatably connected inside the base (1), a lower end of the electrode holder (5) passes through the base (1) and is connected to a plurality of electrodes (6), and the plurality of electrodes (6) are arranged in a ring shape with equal spacing; The electrode seat (5) is transmission-connected to the driving assembly (4) via a synchronous belt (7). 2. An auxiliary fixture for cutting steel bars in an electric spark machine according to claim 1, characterized in that: the driving assembly (4) is composed of a servo motor (401) and a driving wheel (402), the output shaft of the servo motor (401) is passed through the carrier plate (3), and the driving wheel (402) is sleeved on the output shaft of the servo motor (401). 3. An auxiliary fixture for cutting tendons on an electric spark machine according to claim 2, characterized in that: the electrode holder (5) is of a conical structure, the small end of the electrode holder (5) passes through the base (1) and is connected to a plurality of electrodes (6), the large end of the electrode holder (5) is sleeved with a driven wheel (501), and the driven wheel (501) is connected to the driving wheel (402) through a synchronous belt (7) passed through the base (1). 4. An auxiliary clamp for cutting steel bars in an electric spark machine according to claim 3, characterized in that: a clamping platform (502) is provided in the middle of the electrode holder (5), and a ball (504) connected in series through a retaining frame (503) is provided between the clamping platform (502) and the inner cavity of the base (1), and the ball (504) is in rolling contact with the clamping platform (502) and the inner cavity of the base (1). 5. An auxiliary fixture for cutting steel bars in an electrospark machine according to claim 1, characterized in that the electrode (6) is inserted through the bottom of the electrode holder (5) and fixed by bolts.