Quadrilateral clamp for electrical discharge machining of square punching rod
By designing a quadrangle clamp for discharge processing of four-square punch rods, clamping punch rods with clamp bolts and clamping angles, the problem of long machining cycle in the prior art is solved, and a more stable clamping effect and higher machining efficiency are achieved.
Patent Information
- Application Number
- CN202421717039.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The prior art is difficult to efficiently process four-square punch rods, especially because the punch rods are extremely hard, conventional engraving machines and milling cutters cannot be processed, and the clamping force of the flat-mouth clamping fixture of the spark machine is small, so the reference is repeatedly adjusted, resulting in a long processing cycle.
A quadrangle clamp for discharge processing of four-sided punch rods is designed, including a clamp body with a straight prism structure, and a clamping cavity through the top surface and the bottom surface is provided. The clamping angle of the clamping cavity is the same as the dihedral angle at the edge of the punch rod to be processed. The outer wall of the clamping body is provided with a mounting surface in the axial direction. Clamping bolts are provided in the mounting surface. The clamping bolts are connected to the clamping body through a threaded structure and extend into the clamping cavity.
The four-sided punch rod is clamped by clamping bolts and the side walls of the corresponding clamping angles. The contact area is wide and the clamping effect is more stable. The punch rod is automatically perpendicular to the bottom and top surfaces of the fixture, reducing the time of adjusting the reference and improving processing efficiency. It is suitable for the clamping needs of various specification punch rods and expanding the scope of application.
Smart Images
Figure CN223012105U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of cold heading dies, and in particular to a quadrilateral fixture for electric discharge machining of a square punch. Background Art
[0002] The cold heading process is one of the few metal pressure processing processes without cutting. It is a processing method that utilizes the plastic deformation of metal under the action of external force, and with the help of the mold, the metal volume is redistributed and transferred to form the required parts or blanks. In the cold heading die, the punch is an indispensable part. In order to facilitate identification and installation, it is usually necessary to process the specifications / models on the end face of the punch. However, the punch itself has an extremely high hardness of HRC60-67, which cannot be processed by conventional engraving machines and milling cutters. It needs to be processed by spark machines. Some punches are regular prism structures, and the flat-nose pliers of the spark machine have a small clamping force, and the benchmark needs to be repeatedly adjusted to ensure that the end face of the punch is perpendicular to the electrode of the spark machine, resulting in a long processing cycle. Therefore, improvements need to be proposed. Utility Model Content
[0003] The utility model aims to provide a quadrangular clamp for electric discharge machining of a square punch, so as to overcome the shortcomings of the prior art.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] An embodiment of the present application discloses a quadrilateral clamp for electric discharge machining of a square punch, comprising a clamp body with a right prism structure, wherein the clamp body is provided with a clamping cavity penetrating the top and bottom surfaces thereof, wherein one dihedral angle of the clamping cavity is a clamping angle, and the size of the dihedral angle is the same as the size of the dihedral angle at one side edge of the square punch to be machined, wherein an outer wall of the clamp body is provided with a mounting surface along its axial direction, wherein the mounting surface is perpendicular to the angle bisector of the clamping angle, wherein a clamping bolt is provided in the mounting surface, wherein the clamping bolt is connected to the clamp body through a threaded structure and extends into the clamping cavity.
[0006] Furthermore, in the above-mentioned quadrilateral clamp for discharge machining of square punches, an abutment rod is slidably arranged near one end of the clamping bolt to be machined, and an abutment boss is arranged at the end of the abutment rod facing away from the clamping bolt, and the outer end surface of the abutment boss is concavely provided with a V-groove corresponding to the square punch to be machined.
[0007] Furthermore, in the above-mentioned quadrilateral clamp for electric discharge machining of a square punch, a spring is provided between the abutment boss clamping bolts, and the spring is sleeved on the abutment rod.
[0008] Furthermore, in the above-mentioned quadrilateral fixture for electric discharge machining of a square punch, the end surface of the abutment rod facing away from the V-shaped groove is a spherical structure.
[0009] Furthermore, in the above-mentioned quadrilateral clamp for electric discharge machining of a square punch, the number of the clamping bolts is at least two.
[0010] Furthermore, in the above-mentioned quadrilateral clamp for electric discharge machining of a square punch, the center axis of the clamping bolt is coplanar with the angle bisector of the clamping angle.
[0011] Furthermore, in the above-mentioned quadrilateral clamp for electric discharge machining of a square punch, a self-locking nut is provided on the clamping bolt, and the self-locking nut is arranged on the outside of the clamping cavity.
[0012] Furthermore, in the above-mentioned quadrilateral fixture for electric discharge machining of a square punch, the cross section of the clamping cavity is a square.
[0013] Compared with the prior art, the advantages of the utility model are: the square clamp used for discharge machining of square punches has a simple structure, and the square punches are clamped by clamping bolts and the side walls corresponding to the clamping angles, with a wide contact area and a more stable clamping effect. Under the action of the clamping bolts, the punches are simultaneously clamped against the two side walls of the clamping angle, automatically perpendicular to the bottom and top surfaces of the clamp, reducing the time for adjusting the reference, and the clamping cavity can accommodate the clamping needs of punches of various specifications, thereby expanding the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0015] Figure 1 The figure shows a schematic structural diagram of a quadrilateral fixture for electric discharge machining of a square punch in a specific embodiment of the utility model.
[0016] Figure 2 Shown is a schematic structural diagram of a clamping bolt in a specific embodiment of the utility model. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present utility model will be described in detail below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0018] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.
[0019] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0020] Refer Figure 1 and Figure 2 As shown, a quadrilateral fixture for electrical discharge machining a square punch rod includes a fixture body 1 with a straight prism structure. A clamping cavity 11 penetrating its top and bottom surfaces is provided inside the fixture body 1. One dihedral angle of the clamping cavity 11 is a clamping angle, and the size of its angle is the same as the size of the dihedral angle at one side edge of the square punch rod to be machined. An installation surface 12 is provided on the outer wall of the fixture body 1 along its axial direction. The installation surface 12 is perpendicular to the angular bisecting plane of the clamping angle. A clamping bolt 2 is provided inside the installation surface 12. The clamping bolt 2 is connected to the fixture body 1 through a threaded structure and extends into the clamping cavity 11.
[0021] In this technical solution, the fixture body is a straight quadrangular prism structure, which is directly processed by existing square steel, etc. A clamping cavity is arranged in the fixture body along its axial direction, and the clamping cavity runs through the bottom and top surfaces of the fixture body. A mounting surface is processed at the side edge relative to the clamping angle, and a threaded through hole perpendicular to the axial direction of the fixture body is processed in the mounting surface for setting a clamping bolt. When in use, the fixture body can be directly placed on the disk of the spark machine, and the punch to be processed is placed in the clamping cavity, and is clamped to the clamping angle in the clamping cavity by the clamping bolt. The two surfaces of the clamping angle are respectively attached to the two side surfaces of the punch, and cooperate with the clamping bolt to clamp the punch from three directions to ensure sufficient clamping Tightening force, at the same time, the two surfaces of the clamping angle are respectively fitted to the two side surfaces of the punch rod, that is, the axial direction of the punch rod is parallel to the axial direction of the clamping cavity, that is, the top surface of the punch rod is perpendicular to the electrode of the spark machine, which reduces the time for adjusting the reference and improves the processing efficiency; the square clamp used for discharge machining of the square punch rod has a simple structure, and the square punch rod is clamped by the clamping bolts and the side walls corresponding to the clamping angle, with a wide contact area and a more stable clamping effect. Under the action of the clamping bolts, the punch rod is simultaneously held against the two side walls of the clamping angle, automatically perpendicular to the bottom and top surfaces of the clamp, reducing the time for adjusting the reference, and the clamping cavity can accommodate the clamping needs of punches of various specifications, thereby expanding the scope of application.
[0022] For example, see Figure 2 As shown, abutment rod 3 is slidably provided at one end of clamping bolt 2 near the square punch to be processed, and abutment boss 31 is provided at the end of abutment rod 3 away from clamping bolt 2, and the outer end surface of abutment boss 31 is concavely provided with V-shaped groove 311 corresponding to the square punch to be processed.
[0023] In this technical solution, a connecting hole is machined along the axial direction of the tail of the clamping bolt, and the abutment rod is a T-shaped shaft structure, which is slidably connected to the connecting hole and does not interfere with the rotation of the clamping bolt. The outer end surface of the abutment boss is concavely provided with a V-shaped groove corresponding to the square punch to be processed. It abuts against the surface of the square punch to be processed through the V-shaped groove, avoiding direct abutment against the side edge of the punch, thereby improving the reliability and stability of clamping.
[0024] For example, see Figure 2 As shown, a spring 4 is arranged between the abutting boss 31 and the clamping bolt 2 , and the spring 4 is sleeved on the abutting rod 3 .
[0025] In this technical solution, the clamping bolt acts axially in front of the abutment rod, and the abutment rod is elastically abutted against the surface of the punch rod through the action of the spring, which facilitates clamping.
[0026] For example, see Figure 2 As shown, the end surface of the abutment rod 3 facing away from the V-shaped groove is a spherical structure.
[0027] In this technical solution, a ball-end countersinking cutter is used to machine connection holes such as these. The bottom of the connection hole is a spherical structure. The length of the abutting rod is greater than the depth of the connection hole. When the clamping bolt is tightened, the bottom of the connection hole abuts against the corresponding end of the abutting rod, the V-groove abuts against the surface of the square punch rod to be machined, and the punch rod is fixed. The bottom of the connection hole and the end of the abutting rod are in spherical contact to prevent the abutting rod from rotating with the workpiece.
[0028] Exemplarily, referring to Figure 1 as shown, the number of clamping bolts 2 is at least two.
[0029] In this technical solution, multi-point locking is used to improve the clamping strength of the punch rod.
[0030] Exemplarily, referring to Figure 1 as shown, the central axis of the clamping bolt 2 is perpendicular to the axis of the fixture body and coplanar with the angular bisecting plane of the clamping angle.
[0031] In this technical solution, the clamping bolt acts perpendicularly on the punch rod, and the acting forces of the two planes of the clamping angle on the punch rod are equal in magnitude, improving the stability of the punch rod clamping.
[0032] Exemplarily, referring to Figure 1 as shown, a self-locking nut 5 is provided on the clamping bolt 2, and the self-locking nut 5 is arranged outside the clamping cavity 11.
[0033] In this technical solution, a conventional hexagonal nut can be selected as the self-locking nut, which is matched with the threaded through hole in the installation surface to lock the position of the clamping bolt and prevent the clamping bolt from loosening due to vibration or the like during the machining process.
[0034] Exemplarily, referring to Figure 1 and Figure 2 as shown, the cross-section of the clamping cavity 11 is square.
[0035] In this technical solution, the cross-section of the clamping cavity is square and is used to machine punch rods with a regular quadrangular prism structure. To improve the material utilization rate, the inner wall of the clamping cavity is parallel to the side wall of the fixture body close to it, and the clamping cavity can accommodate the clamping requirements of various specifications of punch rods, expanding the scope of use.
[0036] In summary, the square-shaped fixture for electrical discharge machining of square punch rods has a simple structure. The square punch rod is clamped by the clamping bolt and the side walls of the corresponding clamping angle, with a wide contact area and a more stable clamping effect. Under the action of the clamping bolt, the punch rod abuts against the two side walls of the clamping angle at the same time, automatically perpendicular to the bottom and top surfaces of the fixture, reducing the time for adjusting the calibration reference. The clamping cavity can accommodate the clamping requirements of various specifications of punch rods, expanding the scope of application.
[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.
[0038] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.
Claims
1. A quadrilateral fixture for electric discharge machining of a square punch, characterized in that: The invention comprises a fixture body with a right prism structure, wherein a clamping cavity penetrating the top and bottom surfaces of the fixture body is arranged in the fixture body, wherein a dihedral angle of the clamping cavity is a clamping angle, and the size of the dihedral angle is the same as the size of the dihedral angle at the edge of one side of the square punch to be processed, and an outer wall of the fixture body is provided with a mounting surface along its axial direction, wherein the mounting surface is perpendicular to the angle bisector of the clamping angle, and a clamping bolt is arranged in the mounting surface, wherein the clamping bolt is connected to the fixture body through a threaded structure and extends into the clamping cavity.
2. The quadrilateral fixture for electric discharge machining of a square punch according to claim 1, characterized in that: An abutment rod is slidably arranged at one end of the clamping bolt close to the square punch to be processed, and an abutment boss is arranged at one end of the abutment rod away from the clamping bolt. The outer end surface of the abutment boss is concavely provided with a V-shaped groove corresponding to the square punch to be processed.
3. The quadrilateral fixture for electric discharge machining of a square punch according to claim 2, characterized in that: A spring is arranged between the abutting boss and the clamping bolt, and the spring is sleeved on the abutting rod.
4. The quadrilateral fixture for electric discharge machining of a square punch according to claim 2, characterized in that: The end surface of the abutment rod facing away from the V-shaped groove is a spherical structure.
5. The quadrilateral fixture for electric discharge machining of a square punch according to claim 1, characterized in that: The number of the clamping bolts is at least two.
6. The quadrilateral fixture for electric discharge machining of a square punch according to claim 5, characterized in that: The center axis of the clamping bolt is coplanar with the angle bisector of the clamping angle.
7. The quadrilateral fixture for electric discharge machining of a square punch according to claim 1, characterized in that: The clamping bolt is provided with a self-locking nut, and the self-locking nut is arranged on the outside of the clamping cavity.
8. The quadrangular fixture for electric discharge machining of a square punch according to any one of claims 1 to 7, characterized in that: The cross section of the clamping cavity is square.