Special-shaped pin machining tool for mold

Abstract

The utility model relates to a kind of special-shaped pin processing frock of mould, it includes bottom plate, bottom plate top is equipped with backplate, the front part of backplate is equipped with clamping plate, clamping plate is sequentially arranged with chucking hole along length direction, two ends of each chucking hole and the upper and lower end surfaces of clamping plate are through, clamping plate is also correspondingly provided with the side hole screw hole corresponding with chucking hole, one end of side hole screw hole is communicated with corresponding chucking hole, other end is communicated with clamping plate side wall, side hole screw hole is screw-connected with locating bolt, locating bolt allows to enter or exit chucking hole.The processing frock of the technical scheme has precise circumferential positioning function, can eliminate the deflection when special-shaped pin is processed, so that it maintains high assembly precision and use performance, and supports the synchronous processing of multiple special-shaped pins, to greatly improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining tooling technology, and more specifically to a tooling for machining irregular pins of molds. Background Technology

[0002] A mold shaped pin is a non-standard pin designed according to special needs. It has a special shape and function that differs from conventional cylindrical pins. It is mainly used for ejection, precise positioning, local cooling, or special guidance of complex structural products. Shaped pins are usually made of high-quality hot work die steel and are precision machined and specially surface treated to meet the special functional requirements of molds under high temperature and high pressure conditions. They effectively solve complex forming problems that standard pins cannot handle and are important functional components for improving the quality of molded parts and the life of molds.

[0003] Irregularly shaped pins require positioning using machining fixtures during processing. Currently, traditional machining fixtures struggle to achieve stable circumferential positioning for these pins, especially during milling operations on the irregularly shaped pin ends in machining centers. The milling force can easily cause slight rotation, leading to angular deviations between the machined critical dimensions and the design datum, severely impacting assembly accuracy and performance. Furthermore, traditional machining fixtures only support positioning of single irregularly shaped pins, requiring them to be clamped and processed individually, preventing simultaneous processing of multiple pieces and significantly hindering production efficiency. Utility Model Content

[0004] In response to the above issues, and to overcome the current problems of irregular pin processing fixtures failing to achieve stable circumferential positioning of irregular pins, causing slight rotation of irregular pins during processing, resulting in angular deviations between key dimensions and design benchmarks, affecting assembly accuracy and performance, and requiring irregular pins to be clamped and processed individually rather than simultaneously, severely restricting production efficiency, the purpose of this utility model is to provide an irregular pin processing fixture with precise circumferential positioning function, eliminating deflection during irregular pin processing, maintaining high assembly accuracy and performance, and supporting simultaneous processing of multiple irregular pins, thereby significantly improving production efficiency.

[0005] To achieve the above objectives, the technical solution of this utility model is:

[0006] A tooling for machining irregular pins for molds includes a base plate, a back plate on the top of the base plate, a clamping plate at the front of the back plate, clamping holes arranged sequentially along the length of the clamping plate, the two ends of each clamping hole communicating with the upper and lower end faces of the clamping plate, the clamping plate also having corresponding side screw holes, one end of the side screw hole communicating with the corresponding clamping hole, and the other end communicating with the side wall of the clamping plate, the side screw hole being threadedly connected to a positioning bolt, the positioning bolt being allowed to enter or exit the clamping hole.

[0007] Preferably, the cross-sectional area of ​​the clamping hole is larger than the cross-sectional area of ​​the shaped pin.

[0008] Preferably, the clamping hole includes an arc-shaped hole section and a tapered hole section, with the side screw hole communicating with the arc-shaped hole section and the tapered hole section opposite to the side screw hole.

[0009] Preferably, the back plate has a receiving groove corresponding to the clamping plate, the clamping plate is fitted into the receiving groove, and the clamping plate and the receiving groove are fixed together by a first fastening bolt that passes through each other.

[0010] Preferably, the top of the back plate has a first screw hole, the first screw hole is threaded to a second fastening bolt, and the clamp plate has a positioning groove corresponding to the head of the second fastening bolt, the head of the second fastening bolt is embedded in the positioning groove.

[0011] Preferably, a clearance groove is provided at the transition between the bottom wall and the side wall of the receiving groove.

[0012] Preferably, the top of the base plate is also provided with a backing plate, which fits against the back plate.

[0013] Preferably, the top of the base plate has a fitting groove corresponding to the back plate, the back plate is fitted into the fitting groove and fixed to the base plate by a third fastening bolt passing through the fitting groove, and fixed to the back plate by a fourth fastening bolt passing through the back plate.

[0014] Preferably, a front step is formed between the base plate and the back plate, and a rear step is formed between the base plate and the back plate.

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] (1) The irregular pin needs to be inserted into the clamping hole first, and then the positioning bolt is tightened against the wall of the clamping hole. The horizontal movement limit is obtained through the wall of the clamping hole. At the same time, under the tightening action of the positioning bolt, it is also constrained in the vertical direction and the rotational freedom is limited. Thus, the stability and accuracy of the overall positioning are significantly improved, solving the problem of slight rotation that is easy to occur when milling the irregular shape of the pin end face in the machining center. It also avoids the critical dimensions of the irregular pin after machining from the design datum from having angular deviations that affect the assembly accuracy and performance.

[0017] (2) The design of multiple clamping holes on the clamping plate allows for the positioning of multiple irregular pins to be processed at the same time, eliminating the need for sequential clamping and individual processing, thus enabling simultaneous processing of multiple parts and significantly improving production efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the processing tooling of this utility model;

[0019] Figure 2This is a schematic diagram of the overall structure of the processing tooling of this utility model from another perspective;

[0020] Figure 3 This is a side view schematic diagram of the processing tooling of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the back plate of the processing tooling of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the processing tooling clamping plate of this utility model;

[0023] Figure 6 This is a schematic diagram of the overall structure of the irregularly shaped pin to be processed when it is positioned by the processing tooling of this utility model;

[0024] Figure 7 This is a top view of the structure of the irregularly shaped pin to be processed when it is positioned by the processing tooling of this utility model.

[0025] As shown in the figure:

[0026] 1. Base plate; 101. Fitting groove; 1a. Front step position; 1b. Rear step position; 2. Back plate; 201. Receiving groove; 201a. Clearance groove; 202. First screw hole; 3. Clamping plate; 301. Clamping hole; 301a. Arc-shaped hole section; 301b. Tapered hole section; 302. Side screw hole; 303. Positioning groove; 4. Positioning bolt; 5. First fastening bolt; 6. Second fastening bolt; 7. Backing plate; 8. Third fastening bolt; 9. Fourth fastening bolt; 10. Irregular pin. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the purpose of simplifying the description and do not indicate or imply that the orientation is a specific orientation or specific orientation structure and operation. Therefore, they should not be construed as limiting this utility model.

[0029] like Figure 1 as well as Figures 5 to 7As shown, a tooling for machining irregularly shaped pins in a mold includes a base plate 1, a back plate 2 on the top of the base plate 1, the back plate 2 being perpendicular to the base plate 1, and a clamping plate 3 at the front of the back plate 2. The clamping plate 3 has a plurality of clamping holes 301 arranged sequentially along its length. Each clamping hole 301 is a through hole, and both ends of the clamping holes 301 communicate with the upper and lower end faces of the clamping plate 3. The clamping holes 301 are used to install the irregularly shaped pin 10 to be machined. The irregularly shaped pin 10 needs to be installed by inserting it into the clamping holes 301. The clamping plate 3 also... A side screw hole 302 corresponding to the clamping hole 301 should be provided. One end of the side screw hole 302 communicates with the corresponding clamping hole 301, and the other end communicates with the side wall of the clamping plate 3. That is to say, the axis of the side screw hole 302 is perpendicular to the axis of the clamping hole 301. A positioning bolt 4 is threaded into the side screw hole 302. The positioning bolt 4 can move along the axial direction of the side screw hole 302 by rotation, thereby entering or exiting the clamping hole 301. When a special-shaped pin 10 is installed in the clamping hole 301... Then rotate the positioning bolt 4 to enter the clamping hole 301. With continuous movement, the positioning bolt 4 can contact the surface of the irregular pin 10 and apply a clamping force to the irregular pin 10. Under the action of this clamping force, the irregular pin 10 will be tightly abutted against the inner wall of the clamping hole 301, completing the clamping and positioning. In the positioning state, the irregular pin 10 is limited to horizontal movement through the hole wall of the clamping hole 301. At the same time, under the tightening action of the positioning bolt 4, it is also constrained in the vertical direction and the rotational freedom is restricted. Thus, the stability and accuracy of the overall positioning are significantly improved. This solves the problem of slight rotation that is easy to occur when milling the irregular shape of the pin end face in the machining center. It also avoids the critical dimensions of the irregular pin 10 after machining from the design datum due to angular deviation, which affects the assembly accuracy and performance. In addition, the design of multiple clamping holes 301 allows the positioning of multiple irregular pins 10 to be processed at the same time, without the need for clamping and processing one by one, realizing the synchronous processing of multiple parts and significantly improving the production efficiency.

[0030] like Figure 6 and Figure 7 As shown, the cross-sectional area of ​​the clamping hole 301 is larger than that of the shaped pin 10, enabling it to accommodate shaped pins 10 of various diameters. Under the tightening force of the positioning bolt 4, shaped pins 10 of different sizes can fit tightly against the hole wall of the clamping hole 301, thereby significantly expanding the versatility and adaptability of the clamping hole 301.

[0031] like Figure 5 and Figure 7As shown, the clamping hole 301 consists of two parts: an arc-shaped hole section 301a and a tapered hole section 301b. The arc-shaped hole section 301a is close to the side screw hole 302, and the side screw hole 302 is connected to the arc-shaped hole section 301a. The tapered hole section 301b is located on the side away from the side screw hole 302, that is, it is opposite to the side screw hole 302. The tapered hole section 301b converges in the direction away from the side screw hole 302. When the shaped pin 10 is inserted into the clamping hole 301, it will be pressed against the tapered hole section 301b under the action of the positioning bolt 4. A linearly distributed contact surface will be formed between the tapered hole section 301b and the shaped pin 10, thereby generating higher contact stress in the contact area and significantly enhancing the positioning stability of the shaped pin 10.

[0032] like Figures 1 to 4 as well as Figure 6 As shown, the back plate 2 has a receiving groove 201 corresponding to the clamping plate 3. It can be understood that the receiving groove 201 is located at the front of the clamping plate 3 and is connected to the top plate of the back plate 2. The clamping plate 3 is embedded in the receiving groove 201 and is limited and supported by the groove wall of the receiving groove 201. At the same time, the clamping plate 3 and the receiving groove 201 are fixed by the first fastening bolt 5 that passes through each other. In this utility model, there are 4 first fastening bolts 5. The four positioning bolts are distributed on the clamping plate 3 near the diagonal, thereby increasing the number of positioning points between the clamping plate 3 and the back plate 2 and improving the stability of the clamping plate 3.

[0033] like Figures 1 to 7 As shown, a first screw hole 202 is provided on the top of the back plate 2, and a second fastening bolt 6 is threadedly connected to the first screw hole 202. In this utility model, there are two second fastening bolts 6. A positioning groove 303 corresponding to the head of the second fastening bolt 6 is provided on the clamping plate 3. The head of the second fastening bolt 6 is embedded in the positioning groove 303, that is, the head of the second fastening bolt 6 extends to the top of the clamping plate 3. The upward movement of the clamping plate 3 is effectively restricted by axial constraint, which plays a limiting role and further improves the stability of the connection between the clamping plate 3 and the back plate 2.

[0034] like Figures 1 to 4 as well as Figure 6 As shown, an avoidance groove 201a is provided at the transition between the bottom wall and the side wall of the receiving groove 201, thereby reducing the processing difficulty at the transition between the bottom wall and the side wall of the receiving groove 201, reducing the impact of processing errors on the installation of the clamping plate 3, and ensuring high-precision fitting between the clamping plate 3 and the inner wall of the receiving groove 201.

[0035] like Figures 1 to 3 as well as Figure 6 and Figure 7As shown, due to the large length of some irregular pins 10, the height of the back plate 2 needs to be matched to meet the processing requirements of these irregular pins 10. However, this will result in the back plate 2 having an excessively high center of gravity, posing a risk of tipping over. Therefore, a backing plate 7 is set on the top of the base plate 1. The backing plate 7 fits against the back plate 2. The backing plate 7 optimizes the counterweight of the back plate 2, thereby lowering the center of gravity of the back plate 2, significantly improving the stability of the equipment, and preventing the back plate 2 from tipping over.

[0036] like Figures 1 to 3 as well as Figure 6 and Figure 7 As shown, the top of the base plate 1 has a fitting groove 101 corresponding to the backing plate 7. The backing plate 7 is fitted into the fitting groove 101. The side wall of the fitting groove 101 restricts the horizontal movement and deflection of the backing plate 7, thereby preventing the backing plate 7 from tipping over and maintaining a close fit with the backing plate 2. It should be mentioned that both ends of the fitting groove 101 are connected to the corresponding side wall of the base plate 1, allowing the backing plate 7 to be inserted into the fitting groove 101 and precisely installed in place. The backing plate 7 is fixed to the base plate 1 by a third fastening bolt 8 that passes through the fitting groove 101, and also fixed to the backing plate 2 by a fourth fastening bolt 9 that passes through the backing plate 2. In this utility model, multiple third fastening bolts 8 and fourth fastening bolts 9 are provided. Each third fastening bolt 8 and fourth fastening bolt 9 fixes the backing plate 7 horizontally and perpendicularly to the horizontal direction, thereby better connecting it with the base plate 1 and the backing plate 2 as a whole, ensuring a precise fit over a long period of time.

[0037] like Figures 1 to 3 as well as Figure 6 and Figure 7 As shown, a front step 1a is formed between the base plate 1 and the back plate 2, and a rear step 1b is formed between the base plate 1 and the back plate 7. The front step 1a and the rear step 1b are opposite each other and are used to be pressed by the pressure plate of the die-casting machine during the processing of the irregular pin 10. In this way, the positioning points with the pressure plate will be symmetrically distributed, thereby making the processing fixture of this utility model firmly fixed to the die-casting machine.

[0038] Combination Figures 1 to 7The tooling for machining the irregular pin 10 of this utility model uses the front step 1a and rear step 1b formed between the base plate 1, the back plate 2, and the abutment plate 7 to press it against the die-casting machine, thus fixing it to the die-casting machine. The irregular pin 10 to be machined is inserted into the clamping hole 301 of the clamping plate 3, and then the positioning bolt 4, which is threaded to the side hole, is rotated to allow the positioning bolt 4 to enter the clamping hole 301, pressing the irregular pin 10 against the corresponding tapered hole section 301b of the clamping hole 301. The irregular pin 10 is thus clamped and positioned. In this state, the irregular pin 10 is limited to horizontal movement through the wall of the clamping hole 301. At the same time, under the tightening action of the positioning bolt 4, it is also constrained in the vertical direction and restricted in rotational freedom. Moreover, multiple clamping holes 301 allow multiple irregular pins 10 to be processed to be positioned simultaneously, without the need for sequential clamping and individual processing, realizing multi-part synchronous processing, which significantly improves production efficiency. During the processing, the backing plate 7 can optimize the counterweight of the back plate 2, thereby lowering the center of gravity of the back plate 2 and preventing the back plate 2 from tipping over.

[0039] The embodiments and descriptions above are merely illustrative of the principles and preferred embodiments of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A tooling for machining irregularly shaped pins in a mold, characterized in that, It includes a base plate (1), a back plate (2) on the top of the base plate (1), a clamping plate (3) at the front of the back plate (2), and clamping holes (301) arranged sequentially along the length of the clamping plate (3). The two ends of each clamping hole (301) are connected to the upper and lower end faces of the clamping plate (3). The clamping plate (3) is also provided with a side screw hole (302) corresponding to the clamping hole (301). One end of the side screw hole (302) is connected to the corresponding clamping hole (301), and the other end is connected to the side wall of the clamping plate (3). The side screw hole (302) is threaded with a positioning bolt (4), which allows the positioning bolt (4) to enter or exit the clamping hole (301).

2. The tooling for machining irregularly shaped pins in a mold according to claim 1, characterized in that, The cross-sectional area of ​​the clamping hole (301) is greater than the cross-sectional area of ​​the shaped pin (10).

3. The tooling for machining irregularly shaped pins in a mold according to claim 2, characterized in that, The clamping hole (301) includes an arc-shaped hole section (301a) and a tapered hole section (301b). The side screw hole (302) is in communication with the arc-shaped hole section (301a), and the tapered hole section (301b) is opposite to the side screw hole (302).

4. A tooling for machining irregularly shaped pins for a mold according to any one of claims 1 to 3, characterized in that, The back plate (2) has a receiving groove (201) corresponding to the clamp plate (3). The clamp plate (3) is embedded in the receiving groove (201). The clamp plate (3) and the receiving groove (201) are fixed by a first fastening bolt (5) that passes through each other.

5. The tooling for machining irregularly shaped pins in a mold according to claim 4, characterized in that, The back plate (2) has a first screw hole (202) at the top, and a second fastening bolt (6) is threaded into the first screw hole (202). The clamping plate (3) has a positioning groove (303) corresponding to the head of the second fastening bolt (6), and the head of the second fastening bolt (6) is embedded in the positioning groove (303).

6. The tooling for machining irregularly shaped pins in a mold according to claim 5, characterized in that, A clearance groove (201a) is provided at the transition between the bottom wall and the side wall of the receiving groove (201).

7. A tooling for machining irregularly shaped pins in a mold according to any one of claims 1, 2, 3, 5, or 6, characterized in that, The bottom plate (1) is also provided with a backing plate (7) at the top, and the backing plate (7) is in contact with the back plate (2).

8. The tooling for machining irregularly shaped pins in a mold according to claim 7, characterized in that, The top of the base plate (1) is provided with a fitting groove (101) corresponding to the back plate (7). The back plate (7) is fitted into the fitting groove (101) and fixed to the base plate (1) by a third fastening bolt (8) that passes through the fitting groove (101), and fixed to the back plate (2) by a fourth fastening bolt (9) that passes through the back plate (2).

9. The tooling for machining irregularly shaped pins in a mold according to claim 8, characterized in that, A front step (1a) is formed between the base plate (1) and the back plate (2), and a rear step (1b) is formed between the base plate (1) and the back plate (7).

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