CN203778564U - Punch fixing structure - Google Patents

Abstract

The utility model discloses a punch fixing structure, which comprises a punch, a punch fixing seat, a mold base and a fixing seat backing plate fixed on the mold base, the punch is fixed on the punch fixing seat, and the punch fixing seat It is fixed on the backing plate of the fixed seat, the punch holder is provided with a punch socket, the tail end of the punch is inserted into the punch socket, and the punch holder is provided with a tapered punch radially penetrating through the punch socket. The head pin hole, the tail end of the punch is also provided with a tapered punch side lock pin hole radially penetrating the punch, the punch tail end is also provided with a tapered punch side lock pin, the punch side lock pin runs through the The punch pin hole and the punch side lock pin hole. The utility model adopts the pin-hole matching method to fix the punch. This kind of fixed structure is not easy to be damaged, and has a longer service life than the fixed structure in the form of bolt compression, and can more reliably ensure the normal operation of the punch. replacement, thereby reducing maintenance costs.

Description

A punch fixing structure

technical field

The utility model relates to a stamping die structure, more specifically, it relates to a punch fixing structure. the

Background technique

The existing punches are generally processed by wire cutting, and the punches processed by this method are straight handles, which are easy to fall off when fixed on the punch holder. The formed punch is closely matched with the punch holder, and the punch holder is processed with a threaded hole, and the bolt is screwed into the threaded hole to press against the peripheral surface of the punch. However, due to the frequent loosening and tightening of the bolts, this method is likely to cause the threaded holes to slip. Increased parts procurement costs, but also constitute an impact on production. The invention with the publication number of CN102886414A disclosed a mold with a detachable punch on January 23, 2013, including a punch base, a compression screw, a punch, and a gasket; the punch base is symmetrically arranged with Two positioning holes; the punch is embedded and installed on the punch base; a gasket is installed between the punch base and the punch; the pressing screw presses and fixes the punch through the positioning hole; the punch The bottom end of the blade is a blade; the material of the punch matrix is Cr12MoV; the material of the blade part is tungsten-cobalt cemented carbide. In this invention scheme, the punch base and the punch are fixed by compression screws. Since the blade wears faster, when the blade is worn, only the punch needs to be replaced, which reduces the friction between the punch base and the punch. The waste caused by the integration, but as mentioned above, frequent disassembly and assembly of the compression screw will not only damage the thread of the compression screw, but also may damage the threaded hole on the punch base. In this case, the punch base must be replaced. the

Utility model content

The existing punch fixing structure adopts the method of pressing the punch with bolts, which is easy to damage the thread structure, resulting in frequent replacement of parts. In order to overcome this defect, the utility model provides a reliable fixing punch. And it is not easy to cause the punch fixing structure with short service life of the punch fixing seat. the

The technical scheme of the utility model is: a punch fixing structure, including a punch, a punch fixing seat, a mold base and a fixing seat backing plate fixed on the mold base, the punch is fixed on the punch fixing seat, and the punch The head holder is fixed on the holder plate, the punch holder is provided with a punch hole, the tail end of the punch is inserted into the punch hole, and the punch holder is provided with a radially penetrating punch hole. Tapered punch pin hole, the tail end of the punch is also provided with a tapered punch side lock pin hole radially penetrating the punch, the punch tail end is also provided with a tapered punch side lock pin, the punch side lock The pin passes through the punch pin hole and the punch side lock pin hole. The punch side lock pin and the punch side lock pin hole on the punch and the punch pin hole on the punch holder all form a taper fit, which can ensure a tight fit, and the punch side lock pin locking method does not require The threaded hole is processed on the punch holder, so there is no problem of replacing the punch holder due to damage to the threaded hole. Relatively speaking, the punch pin hole with a smooth hole wall on the punch holder is less likely to be damaged. In this way, the punch The head fixing structure can fix the punch more reliably and has a longer service life. the

Preferably, both ends of the punch side lock pin are respectively exposed outside the punch pin hole, both ends of the punch side lock pin are cylindrical and provided with external threads, and both ends of the punch side lock pin are screwed with locks. Tighten the nut. Nuts are installed at both ends of the punch side lock pin, so that the punch side lock pin can be kept tightly connected with the punch holder and will not come out. the

Preferably, the punch holder and the backing plate of the holder are connected by bolts. Connect the punch fixing seat and the fixing seat backing plate with bolts, the punch fixing seat can be disassembled more conveniently, once the punch fixing seat needs to be replaced, only a part of the punch fixing seat needs to be replaced. the

Preferably, the base plate of the fixed seat is connected with the mold base by bolts. The holder backing plate is the attachment carrier of the punch holder. The punch holder does not need to be directly connected to the die holder, and the holder backing plate can also be disassembled, so that the die holder will not be easily damaged, and generally does not need to be replaced. the

The beneficial effects of the utility model are:

The fixed punch has high reliability and long service life. The utility model adopts the pin-hole matching method to fix the punch. This kind of fixing structure is not easy to be damaged, and has a longer service life than the fixed structure in the form of bolt compression, and can more reliably ensure the normal operation of the punch.

Reduce maintenance costs. Compared with the prior art, the utility model is less susceptible to damage, and the punch holder does not need to be replaced frequently, thereby reducing the maintenance cost. the

Description of drawings

Fig. 1 is a kind of structural representation of the utility model. the

Among the figure, 1-punch head, 2-punch head holder, 3-die holder, 4-fixation seat backing plate, 5-punch head side lock pin. the

Detailed ways

The utility model will be further described below in conjunction with the specific embodiments of the accompanying drawings. the

Example 1:

      As shown in Figure 1, a punch fixing structure includes a punch 1, a punch fixing seat 2, a mold base 3 and a fixing base plate 4 fixed on the mold base 3, and the punch 1 is fixed on the punch fixing On the seat 2, the punch fixing seat 2 is fixed on the fixing seat backing plate 4, and the punch fixing seat 2 is provided with a punch socket adapted to the diameter of the tail end of the punch 1, and the tail end of the punch 1 is inserted into the punch In the jack, the punch holder 2 is provided with a tapered punch pin hole radially penetrating through the punch jack. The punch pin hole is divided into two sections, which are respectively located on the hole walls on both sides of the punch jack. The tail end of the head 1 is also provided with a tapered punch side lock pin hole radially penetrating the punch 1, the tail end of the punch 1 is also provided with a tapered punch side lock pin 5, and the punch side lock pin 5 runs through the The punch pin hole and the punch side lock pin hole. The taper of the punch pin hole, the punch side lock pin hole and the punch side lock pin 5 is the same. The two ends of the punch side lock pin 5 are respectively exposed outside the punch pin hole. The two ends of the punch side lock pin 5 are cylindrical and are provided with external threads. Tighten the nut. The outer diameters of the two ends of the punch side lock pin 5 are respectively equal to the maximum and minimum end apertures of the punch pin hole. The punch holder 2 and the holder backing plate 4 are connected by bolts. The fixed seat backing plate 4 is also connected with the mold base 3 by bolts.

When installing the punch 1, insert the tail end of the punch 1 into the punch socket, rotate the punch 1 so that the punch side lock pin hole on the punch 1 and the punch pin hole on the punch holder 2 Alignment, at this time, the punch side lock pin hole and the hole walls of the two punch pin holes are just connected to form a continuous, stepless inner tapered surface, and then the punch side lock pin 5 is inserted into the punch side lock pin In the tapered hole formed by the hole and the two-stage punch pin hole, the outer tapered surface of the punch side lock pin 5 forms a tight fit with the inner tapered surface formed by the punch side lock pin hole and the hole wall of the two-stage punch pin hole At this time, the two ends of the punch side lock pin 5 are respectively exposed on both sides of the punch holder 2, and finally the matching nuts are installed on the two ends of the punch side lock pin 5 and tightened, so that the punch 1 is completed. Fixed installation. the

Example 2:

There is no external thread at the two ends of the punch side lock pin 5 . All the other are with embodiment 1.

When the punch 1 is installed, the punch side lock pin 5 is penetrated into the tapered hole formed by the punch side lock pin hole and the two-stage punch pin holes by knocking to form a tight fit. the

Claims (4)

1. A punch fixing structure, including a punch (1), a punch fixing seat (2), a mold base (3) and a fixing base plate (4) fixed on the mold base (3), the punch (1) Fixed on the punch fixing seat (2), the punch fixing seat (2) is fixed on the fixing seat backing plate (4), the characteristic is that the punch fixing seat (2) is provided with a punch socket, The tail end of the punch (1) is inserted into the punch socket, the punch holder (2) is provided with a tapered punch pin hole radially penetrating the punch socket, and the tail end of the punch (1) is also provided with The tapered punch side lock pin hole of the punch (1) is radially penetrated, and a tapered punch side lock pin (5) is provided at the tail end of the punch (1), and the punch side lock pin (5) penetrates In the punch pin hole and the punch side lock pin hole. 2. The punch fixing structure according to claim 1, characterized in that both ends of the punch side locking pin (5) are respectively exposed outside the punch pin hole, and both ends of the punch side locking pin (5) are Cylindrical and provided with external threads, both ends of the punch side lock pin (5) are threaded with lock nuts. 3. The punch fixing structure according to claim 1 or 2, characterized in that the punch fixing seat (2) and the fixing seat backing plate (4) are connected by bolts. 4. The punch fixing structure according to claim 1 or 2, characterized in that the backing plate (4) of the fixing seat (4) is connected with the mold base (3) by bolts.