Punching tool

Abstract

The utility model discloses a punching tool, which belongs to the technical field of barrel punching and is used for solving the problem of poor symmetry precision when two axially symmetrical through holes are machined in the prior art. The punching tool comprises a reciprocating press, a vertical extrusion head and two horizontal punching pieces, wherein the two horizontal punching pieces are symmetrically arranged relative to the axial direction of the vertical extrusion head; the output end of the reciprocating press is fixedly connected with the vertical extrusion head; the horizontal punching piece comprises a slope cushion block, a horizontal cushion block and a horizontal punching head, an alignment hole is formed in the inner wall of the barrel to be punched, the punch end of the horizontal punching head is aligned with the alignment hole, and the horizontal punching head, the horizontal cushion block and the slope cushion block are sequentially arranged in the direction gradually away from the alignment hole; the vertical extrusion head moves downwards to extrude the slope cushion block, and the slope cushion block, the horizontal cushion block and the horizontal punching head integrally move towards the alignment hole and are inserted into the alignment hole. The punching device can be used for punching.

Description

Technical Field

[0001] This utility model belongs to the field of cylindrical punching technology, and in particular relates to a punching tool. Background Technology

[0002] In practical engineering applications, it is sometimes necessary to machine through holes that are symmetrically arranged with respect to the axis of the cylinder.

[0003] Existing punching methods typically process two through holes separately. Due to processing errors, the symmetry accuracy of the two through holes may be poor. Summary of the Invention

[0004] Based on the above analysis, the present invention aims to provide a punching fixture to solve the problem of poor symmetry accuracy when machining two axially symmetrical through holes in the prior art.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions.

[0006] This utility model provides a punching fixture, including a reciprocating press, a vertical extrusion head, and two horizontal punching parts symmetrically arranged with respect to the vertical extrusion head. The output end of the reciprocating press is fixedly connected to the vertical extrusion head. The horizontal punching parts include a sloping pad, a horizontal pad, and a horizontal punching head. An alignment hole is opened in the inner wall of the cylinder to be punched. The punch end of the horizontal punching head is aligned with the alignment hole. The horizontal punching head, the horizontal pad, and the sloping pad are arranged in sequence along the direction gradually away from the alignment hole. The vertical extrusion head moves down to extrude the sloping pad. The sloping pad, the horizontal pad, and the horizontal punching head move as a whole toward the alignment hole and are inserted into the alignment hole.

[0007] Furthermore, the alignment hole is an elongated hole, with its length direction set along the circumference of the cylinder.

[0008] Furthermore, the vertical extrusion head includes a cylindrical section and an inverted frustum section integrally connected along the direction gradually moving away from the output end of the reciprocating press.

[0009] Furthermore, the end face of the inclined pad block facing the inverted frustum section is an inclined plane.

[0010] Furthermore, the inclination angle of the inclined pad towards the end face of the inverted frustum section is equal to the inclination angle of the side wall of the inverted frustum section.

[0011] Furthermore, the end face of the inclined pad facing the inverted frustum section is conformal to the side wall of the inverted frustum section.

[0012] Furthermore, a guide post is provided at the end of the horizontal punch head facing the alignment hole, and the guide post is inserted into the alignment hole.

[0013] Furthermore, the diameter of the guide post is smaller than the diameter of the horizontal punch head.

[0014] Further, the horizontal punching head comprises a conical section and a cylindrical section connected in sequence along a direction gradually away from the guide column.

[0015] Further, the diameter of the conical section gradually increases from the guide column to the cylindrical section, the small end diameter of the conical section is equal to the diameter of the guide column, and the large end diameter of the conical section is equal to the diameter of the cylindrical section.

[0016] Compared with the prior art, the utility model at least can realize following beneficial effect one:

[0017] A) the punching tool provided by the utility model can realize simultaneous processing of two through holes, and since the two horizontal punching pieces are symmetrically arranged relative to the axis of the vertical extruding head, the symmetry precision of the two through holes obtained can be improved.

[0018] B) the punching tool provided by the utility model adopts the form of the vertical extruding head cooperating with the inclined pad block, the horizontal pad block and the horizontal punching head, adopts the symmetric arrangement mode, has simple overall structure, does not have cantilever structure, can directly convert the vertical force of the reciprocating press into horizontal force, ensures that the force of the vertical extruding head is symmetrically transmitted to the two horizontal punching heads, thereby ensuring that the pressure of the reciprocating press is effectively transmitted, and the punching efficiency and punching quality are improved.

[0019] In the utility model, the above technical schemes can be combined with each other to realize more preferred combination schemes. Other features and advantages of the utility model will be described in the subsequent specification, and some advantages can become apparent from the specification or be understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained from the contents specifically pointed out in the specification, examples and drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings are only used for the purpose of showing specific embodiments and are not considered as limiting the utility model, and in the whole drawings, the same reference signs represent the same parts.

[0021] Figure 1 The structure schematic view of the punching tool provided by the utility model embodiment one is shown in the figure.

[0022] Figure 2 The structure schematic view of the punching tool provided by the utility model embodiment one is shown in the figure.

[0023] Figure 3 The structure schematic view of the vertical extruding head in the punching tool provided by the utility model embodiment one is shown in the figure.

[0024] Figure 4 The structure schematic view of the horizontal punching head in the punching tool provided by the utility model embodiment one is shown in the figure.

[0025] Figure 5 The structure diagram of the inclined surface cushion block in the punching tool is provided for the first embodiment of the utility model.

[0026] Reference signs:

[0027] 1-punching cylinder; 2-circular arc groove; 3-supporting table; 4-inverted circular table groove; 5-reciprocating press; 6-vertical extrusion head; 61-cylindrical section; 62-inverted circular table section; 7-inclined surface cushion block; 8-horizontal cushion block; 9-guiding column; 10-horizontal punching head; 101-conical section; 102-cylindrical section. DETAILED DESCRIPTION

[0028] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, wherein the drawings constitute a part of the utility model, and are used together with the embodiments of the utility model to explain the principles of the utility model, and are not used to limit the scope of the utility model.

[0029] Embodiment one

[0030] The embodiment provides a punching tool, referring to Figure 1 , comprising a reciprocating press 5, a vertical extrusion head 6 and two horizontal punching pieces which are axially symmetrical to the vertical extrusion head 6, the output end of the reciprocating press 5 is fixedly connected with the vertical extrusion head 6, the horizontal punching piece comprises an inclined surface cushion block 7, a horizontal cushion block 8 and a horizontal punching head 10 (referring to Figure 5 ), the inner wall of the punching cylinder 1 is provided with an alignment hole, the punch end of the horizontal punching head 10 is aligned with the alignment hole, along the direction gradually far away from the alignment hole, the horizontal punching head 10, the horizontal cushion block 8 and the inclined surface cushion block 7 are sequentially arranged, the vertical extrusion head 6 moves downward to extrude the inclined surface cushion block 7, so that the inclined surface cushion block 7, the horizontal cushion block 8 and the horizontal punching head 10 move as a whole to the direction close to the alignment hole and are inserted into the alignment hole, and punching is realized.

[0031] Compared with the prior art, the punching tool provided by the embodiment can realize the simultaneous machining of two through holes on the one hand, because the two horizontal punching pieces are symmetrically arranged relative to the axis of the vertical extrusion head 6, so that the symmetry precision of the two through holes obtained can be improved; on the other hand, the vertical extrusion head 6 is used in cooperation with the inclined surface cushion block 7, the horizontal cushion block 8 and the horizontal punching head 10, the symmetrical arrangement is adopted, the overall structure is simple, there is no cantilever structure, the vertical force of the reciprocating press 5 can be directly converted into horizontal force, the force symmetry of the vertical extrusion head 6 can be ensured to be transmitted to the two horizontal punching heads 10, so that the pressure of the reciprocating press can be effectively transmitted, the punching efficiency and the punching quality can be improved.

[0032] It is considered that whether the machining of the alignment hole is symmetrical also affects the alignment of the through hole, therefore, the alignment hole is a long hole, the length direction of the long hole is arranged along the circumferential direction of the cylinder body, in this way, the horizontal punching head 10 can align the alignment hole according to the accurate symmetrical position, and high symmetrical machining of the through hole is realized.

[0033] In order to improve the contact stability of the vertical extrusion head 6 and the inclined pad 7, the vertical extrusion head 6 comprises a cylindrical segment 61 and an inverted circular cone segment 62 which are integrally connected along the direction gradually away from the output end of the reciprocating press 5, see Figure 3 The end surface of the inclined pad 7 towards the inverted circular cone segment 62 is an inclined surface, and the inclination angle thereof is equal to the inclination angle of the side wall of the inverted circular cone segment 62, so that the inverted circular cone segment 62 and the inclined pad are in line contact.

[0034] More preferably, the end surface of the inclined pad towards the inverted circular cone segment 62 is conformal with the side wall of the inverted circular cone segment 62, so that the inverted circular cone segment 62 and the inclined pad are in surface contact, thereby being able to ensure effective force transmission.

[0035] In order to be able to support the horizontal punching head 10, the horizontal pad 8 and the inclined pad 7, the punching tooling further comprises a support table 3, see Figure 2 The support table 3 is placed in the cylinder body 1 to be punched, and the horizontal punching head 10, the horizontal pad 8 and the inclined pad 7 are placed on the support table 3.

[0036] Considering that the horizontal punching head 10, the horizontal pad 8 and the inclined pad 7 will be extruded by the cylinder body 1 to be punched and the vertical extrusion head 6, the shapes of the three are all cylindrical, in order to avoid the horizontal punching head 10, the horizontal pad 8 and the inclined pad 7 from rolling and affecting the force transmission, the upper end surface of the support table 3 is provided with a circular arc groove 2, the horizontal punching head 10, the horizontal pad 8 and the inclined pad 7 are placed in the circular arc groove 2, and the circumferential rolling of the horizontal punching head 10, the horizontal pad 8 and the inclined pad 7 is limited by the groove wall of the circular arc groove 2, thereby ensuring effective force transmission.

[0037] In order to be able to increase the vertical displacement of the vertical extrusion head 6, and in turn increase the horizontal displacement of the horizontal punching head 10 and the horizontal pad, the support table 3 is provided with an inverted circular cone groove 4, the inclination angle of the groove wall of the inverted circular cone groove 4 is equal to the inclination angle of the side wall of the inverted circular cone segment 62, and the vertical extrusion head 6 is inserted into the inverted circular cone groove 4 by descending, thereby being able to drive the horizontal punching head 10 to be inserted into the alignment hole to a greater extent.

[0038] Exemplarily, the inclination angle of the groove wall of the inverted circular cone groove 4, the inclination angle of the side wall of the inverted circular cone segment 62 and the inclination angle of the end surface of the inclined pad towards the inverted circular cone segment 62 are all 20-35°.

[0039] In order to facilitate the insertion of the inverted circular truncated cone section 62 into the inverted circular truncated cone groove 4, the bottom width of the inverted circular truncated cone groove 4 is greater than the bottom diameter of the inverted circular truncated cone section 62, and the ratio of the bottom width of the inverted circular truncated cone groove 4 to the bottom diameter of the inverted circular truncated cone section 62 is 1.05:1 to 1.15:1.

[0040] It is worth noting that the alignment accuracy of the horizontal punching head 10 and the alignment hole is one of the key factors affecting the accuracy of the nozzle forming. In order to improve the alignment accuracy of the horizontal punching head 10 and the alignment hole, the horizontal punching head 10 is provided with a guide column 9 at one end facing the alignment hole, as shown in Figure 4 The diameter of the guide column 9 is smaller than that of the horizontal punching head 10, and the guide column 9 is inserted into the alignment hole before punching. In this way, by arranging the guide column 9 with a smaller diameter, the overall horizontal displacement of the horizontal punching head 10 can be guided by inserting it into the alignment hole before punching, thereby effectively improving the alignment accuracy of the horizontal punching head 10 and the alignment hole.

[0041] In order to achieve smooth and slow punching of the to-be-punched cylinder, the horizontal punching head 10 comprises a conical section 101 and a cylindrical section 102 connected in sequence in the direction gradually away from the guide column 9. The diameter of the conical section 101 gradually increases from the guide column 9 to the cylindrical section 61, the small end diameter of the conical section 101 is equal to the diameter of the guide column 9, and the large end diameter of the conical section 101 is equal to the diameter of the cylindrical section 102. In this way, by arranging the conical section 101, the gradual deformation from the guide column 9 to the cylindrical section 102 can be realized, and the smooth and slow punching of the to-be-punched cylinder 1 can be realized, thereby ensuring the punching effect.

[0042] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A punching fixture, characterized in that, It includes a reciprocating press, a vertical extrusion head, and two horizontally punched parts arranged symmetrically with respect to the vertical extrusion head. The output end of the reciprocating press is fixedly connected to the vertical extrusion head; The horizontal punching component includes an inclined pad, a horizontal pad, and a horizontal punching head. An alignment hole is opened on the inner wall of the cylinder to be punched. The punch end of the horizontal punching head is aligned with the alignment hole. The horizontal punching head, the horizontal pad, and the inclined pad are arranged in sequence along the direction that gradually moves away from the alignment hole. The vertical extrusion head moves down to extrude the inclined pad, and the inclined pad, horizontal pad, and horizontal punch head move together toward the alignment hole and are inserted into the alignment hole.

2. The punching fixture according to claim 1, characterized in that, The alignment hole is an elongated hole, and the length of the elongated hole is arranged along the circumference of the cylinder.

3. The punching fixture according to claim 1, characterized in that, The vertical extrusion head includes a cylindrical section and an inverted frustum section integrally connected along the direction gradually moving away from the output end of the reciprocating press.

4. The punching fixture according to claim 2, characterized in that, The end face of the inclined pad block facing the inverted frustum section is an inclined surface.

5. The punching fixture according to claim 4, characterized in that, The inclination angle of the inclined pad block toward the end face of the inverted frustum section is equal to the inclination angle of the side wall of the inverted frustum section.

6. The punching fixture according to claim 4, characterized in that, The end face of the inclined pad block facing the inverted frustum section is conformal to the side wall of the inverted frustum section.

7. The punching fixture according to any one of claims 1 to 6, characterized in that, The horizontal punch head has a guide post at one end facing the alignment hole, and the guide post is inserted into the alignment hole.

8. The punching fixture according to claim 7, characterized in that, The diameter of the guide post is smaller than the diameter of the horizontal punch head.

9. The punching fixture according to claim 7, characterized in that, The horizontal punch head includes a conical section and a cylindrical section connected sequentially along a direction gradually moving away from the guide post.

10. The punching fixture according to claim 9, characterized in that, From the guide post to the cylindrical section, the diameter of the conical section gradually increases, the small end diameter of the conical section is equal to the guide post diameter, and the large end diameter of the conical section is equal to the cylindrical section diameter.

Images