Oil hydraulic machine combined punch

Abstract

The utility model discloses a kind of oil press combination puncher including punch head, punch rod and connecting section, the connecting section is connected with oil press, connecting section is the stepped cylinder with round hole in center, the stepped surface of connecting section is adapted with the lap joint surface corresponding to oil press, the circumference of round hole is equipped with first stop, punch rod is cylinder, the top end of punch rod is equipped with second stop, first stop and second stop butt joint, the bottom end center of punch rod is processed thread hole, punch rod upper end is fixedly connected with connecting section, punch head is cylindrical structure, the center of punch head is processed thread hole, the lower end of punch rod is connected with punch head by bolt thread, the lower end face outer circumference of punch head is circumferentially chamfered.The utility model's puncher uses axial sectional structure, it is convenient to replace loss component, does not waste production resource, long service life;Punch head can be replaced with appropriate specification size according to need, and applicability is strong;Punch rod diameter is slightly smaller than punch head diameter, and it is convenient to separate forging and punch.

Description

Technical Field

[0001] This utility model belongs to the technical field of hydraulic press forging equipment, specifically relating to a detachable and replaceable hydraulic press combination punch. Background Technology

[0002] A press is a device that uses the impact force of a punch to cut, punch, or shape metal workpieces. Different target workpieces require different punches. The punch is connected to the press via a dovetail mechanism at the top. Traditional punches use a one-piece structure, which ensures the stability of the punch, but if a part of the punch is damaged, the entire punch needs to be replaced, which is not only time-consuming and labor-intensive, but also greatly increases production costs.

[0003] Currently, there are also split punches that are improvements over integrated punches, such as a split punch die with application number 201520580718.2, which includes a punch base and a punch body. The punch body can be detachably installed in the punch base. Although this punch die adopts a split structure design, it is more inclined to separate the inner and outer layers. It is mainly used for punching process holes. Although it enables the punch base to be reused multiple times and avoids stress fracture points at the contact point between the stamping part and the bottom of the base, thus eliminating stress concentration, the punch body is still an integral structure. The split base serves to strengthen the structure on the outside of the punch body. If the punch body is partially damaged, the entire punch body still needs to be replaced. Replacing or repairing the punch is inconvenient, and the cost of the integral punch is high, increasing production costs. Summary of the Invention

[0004] The purpose of this utility model is to overcome the defects in the prior art and provide a hydraulic press combined punch, which solves the problem that the entire punch needs to be replaced when the punch is partially damaged.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic press combined punch, comprising a punch head, a punch rod, and a connecting section. The connecting section is connected to the hydraulic press and is a stepped cylinder with a central circular hole. The stepped surface of the connecting section is adapted to the corresponding overlapping surface of the hydraulic press. A first stop is provided at the circumference of the circular hole. The punch rod is a cylinder with a second stop at its top. The first stop and the second stop are mated together. A threaded hole is machined at the center of the bottom end of the punch rod. The upper end of the punch rod is fixedly connected to the connecting section. The punch head is a cylindrical structure with a threaded hole machined at its center. The lower end of the punch rod is connected to the punch head by a bolt thread. The outer circumference of the lower end face of the punch head is chamfered.

[0006] Further optimization involves making the diameter of the punch rod smaller than that of the stamping head, and using a slope transition on the outer side of the stamping head facing the punch rod.

[0007] Further optimization involves aligning the first stop of the connecting section with the second stop of the punch rod, and then welding and fixing them circumferentially at the end face where the connecting section meets the punch rod.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0009] 1. The punch adopts an axial segmented structure, which facilitates maintenance and replacement of consumable parts, reduces costs, avoids wasting production resources, and has a long service life.

[0010] 2. The stamping head can be replaced with a suitable size as needed, making it highly adaptable.

[0011] 3. The diameter of the punch rod is slightly smaller than the diameter of the punch head, which facilitates the separation of the forging from the punch. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the combined punch structure of a hydraulic press.

[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the combined punch of a hydraulic press.

[0014] Markings in the diagram: 1-connecting section, 2-punch rod, 3-punch head, 4-bolt. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. The vertical direction described in this invention is related to... Figure 1 and Figure 2 The view direction is consistent from top to bottom.

[0016] like Figure 1 and Figure 2As shown, this utility model provides a hydraulic press combined punch, including a punch head 3, a punch rod 2, and a connecting section 1. The connecting section 1 is connected to the hydraulic press and is a stepped cylinder with a central circular hole. The stepped surface of the connecting section 1 is adapted to the corresponding overlapping surface of the hydraulic press. A first stop is provided at the circumference of the top of the circular hole. The punch rod 2 is a cylinder with a second stop at its top. The first stop and the second stop are mated together. A threaded hole is machined at the center of the bottom end of the punch rod 2. The upper part of the punch rod 2 is fixedly connected to the connecting section. The punch head 3 is a cylindrical structure with a threaded hole machined at its center. The lower end of the punch rod 2 is threadedly connected to the punch head 3 by a bolt 4. The outer circumference of the lower end face of the punch head 3 is chamfered. The diameter of the punch rod 2 is slightly smaller than the diameter of the punch head 3. The outer wall of the punch head 3 facing the punch rod 2 has a slope transition to facilitate the separation of the forging and the punch during forging.

[0017] After the first stop of the connecting section 1 and the second stop of the punch 2 are mated and fitted, the upper and lower end faces of the connecting section 1 and the punch 2 are welded and fixed along the circumference of the punch 2. When disassembling, the corresponding welded part is machined and removed.

[0018] In use, select the appropriate stamping head 3 according to the inner hole size of the workpiece to be forged, and fix the stamping head 3 to the lower end of the punch rod 2 with bolts 4, and then carry out the forging operation. When the stamping head 3 is worn, simply disassemble and replace the stamping head 3 to continue using it. Similarly, when the punch rod or the connecting section is damaged, simply disassemble and replace the corresponding parts to continue using it.

[0019] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An oil press combined punch characterized by: The device includes a punch head, a punch rod, and a connecting section. The connecting section is connected to a hydraulic press and is a stepped cylinder with a central hole. The stepped surface of the connecting section matches the corresponding overlapping surface of the hydraulic press. A first stop is provided at the circumference of the central hole. The punch rod is a cylinder with a second stop at its top. The first stop and the second stop are mated together. A threaded hole is machined at the center of the bottom end of the punch rod. The upper end of the punch rod is fixedly connected to the connecting section. The punch head is a cylindrical structure with a threaded hole machined at its center. The lower end of the punch rod is connected to the punch head by a bolt thread. The outer circumference of the lower end face of the punch head is chamfered.

2. The oil press combined punch according to claim 1, characterized in that: The diameter of the punch rod is smaller than the diameter of the punch head, and the outer wall of the punch head is sloped towards the punch rod.

3. The oil press combined punch according to claim 1, characterized in that: After the first stop of the connecting section and the second stop of the punch rod are mated and fitted, they are welded and fixed along the circumference of the punch rod at the end face where the connecting section and the punch rod meet.

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