Tapered guiding and buffering device of trimming and punching die

Abstract

The utility model relates to the technical field of die manufacturing, and discloses a tapered guiding and buffering device of a trimming and punching die, which comprises four tapered guide block male dies, a die buffering block, a lower die, a tapered guide block female die, a pressure plate and an upper die, the number of the conical guide block female dies is four, the conical guide block female dies are installed on the material pressing plate and are in conical fit with the mold conical guide block male dies, the number of the mold buffer blocks is four, the mold buffer blocks are installed at the four corners of the mold lower die respectively, and the taper angle of the mold conical guide block male dies ranges from 30 degrees to 60 degrees. By arranging the die buffer block, the die assembly impact force is effectively buffered, the abrasion degree of the die is reduced, and the service life of the die is prolonged. Experimental data show that compared with a traditional mold, the service life of the mold adopting the technical scheme is prolonged by 30% or above, and meanwhile the production cost is reduced by 15% or above.

Description

Technical Field

[0001] This utility model relates to the field of mold manufacturing technology, specifically to a tapered guide and buffer device for trimming and punching molds. Background Technology

[0002] In the field of mold manufacturing technology, trimming and punching is a crucial step in achieving high-precision product processing, placing high demands on the guiding accuracy of the mold and the stability of the mold closing process. In existing trimming and punching processes, the control of the clearance between the upper and lower dies and the buffering treatment during mold closing directly affect the processing accuracy of the product and the service life of the mold.

[0003] Traditional molds have significant shortcomings in guiding and cushioning, especially under complex working conditions. The design of the guiding structure often fails to meet the requirements of high-precision fitting, leading to deviations during trimming and punching, which affects product quality. At the same time, due to the lack of effective cushioning devices, the mold is subjected to a large impact force during mold closing, which can easily cause wear or even damage to the mold surface, thereby shortening the mold's service life and increasing production costs.

[0004] To address the aforementioned issues, a conical guide and buffer device for trimming and punching dies is proposed. Utility Model Content

[0005] The purpose of this utility model is to provide a conical guide and buffer device for trimming and punching molds, which solves the problems of insufficient trimming and punching accuracy and easy mold damage caused by improper control of the gap between the upper and lower molds and excessive impact force when the mold is closed in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tapered guide and buffer device for a trimming and punching die, comprising a tapered guide block punch, a die buffer block, a lower die, a tapered guide block die, a pressure plate, and an upper die. The tapered guide block punch is four in number and is installed in key parts of the lower die. The tapered guide block die is four in number and is installed on the pressure plate, forming a tapered fit with the tapered guide block punch. The die buffer block is four in number and is installed at the four corners of the lower die.

[0007] By adopting the above technical solution, its conical structure design is used to guide the upper and lower molds to achieve precise matching during the mold closing process.

[0008] As a further description of the above technical solution: the cone angle of the conical guide block punch of the mold is in the range of 30° to 60°, and the contact area between the conical guide block punch and the conical guide block die reaches 100% when they are closed.

[0009] By adopting the above technical solutions, the stability and accuracy of the guiding process can be guaranteed.

[0010] As a further description of the above technical solution: the conical guide punch of the mold is fixed to the lower mold by bolts, and the flatness error of the upper surface of the lower mold does not exceed 0.01mm.

[0011] The above technical solution is used to fix the mold buffer block. The diameter of the mounting hole matches the outer diameter of the thread of the mold buffer block to ensure the stability of the buffer block installation.

[0012] As a further description of the above technical solution: the mold buffer block is made of elastic material with an elastic modulus ranging from 5MPa to 20MPa, and the height of the mold buffer block is adjustable and fixed to the lower mold by a threaded connection.

[0013] By adopting the above technical solution, the assembly accuracy with other components can be ensured.

[0014] As a further description of the above technical solution: the top of the mold buffer block is provided with an arc-shaped contact surface, which matches the bottom plane of the pressure plate to increase the contact area.

[0015] By adopting the above technical solution, the stability of the buffer block installation is ensured.

[0016] As a further description of the above technical solution: the bottom plane of the pressure plate has a hardness range of HRC50 to HRC60, and the pressure plate is provided with guide grooves around its perimeter for cooperating with the guide pillars of the upper mold.

[0017] By adopting the above technical solution, the stability of the pressure plate during the downward movement is ensured.

[0018] As a further description of the above technical solution: the bottom of the upper mold is provided with four guide pillars, and the top of the upper mold is provided with an installation interface for connecting to the drive device of the press.

[0019] By adopting the above technical solutions, its wear resistance and corrosion resistance can be improved.

[0020] As a further description of the above technical solution: the four corners of the lower mold are provided with mounting holes, and the diameter of the mounting holes matches the outer diameter of the thread of the mold buffer block to ensure the stability of the buffer block installation.

[0021] By adopting the above technical solution, the stability of the buffer block installation is ensured.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] 1. The present invention provides a tapered guide and buffer device for trimming and punching mold. Firstly, by setting a tapered guide block for the mold, the accuracy of trimming and punching of the product parts is significantly improved. The matching design of the tapered guide block punch and the tapered guide block die reduces the deviation of the upper and lower die fitting clearance, thereby improving the dimensional accuracy of trimming and punching to within ±0.02mm.

[0024] 2. This utility model provides a conical guide and buffer device for a trimming and punching die. By setting a die buffer block, it effectively buffers the impact force of die closing, reduces the wear of the die, and extends the service life of the die. Experimental data shows that the service life of the die using the technical solution of this invention is increased by more than 30% compared with the traditional die, while the production cost is reduced by more than 15%. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a partially enlarged schematic diagram of the present invention, showing the cone-shaped guide block punch and the cone-shaped guide block die.

[0027] In the diagram: 1. Conical guide block punch; 2. Buffer block; 3. Lower die; 4. Conical guide block die; 5. Pressure plate; 6. Upper die. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To further understand the contents of this utility model, a detailed description of this utility model will be provided with reference to the accompanying drawings.

[0030] Reference Figures 1-2 This utility model discloses a tapered guide and buffer device for a trimming and punching die, comprising a tapered guide punch 1, a buffer block 2, a lower die 3, a tapered guide die 4, a pressure plate 5, and an upper die 6. The fit and operation of these components and their working principle in actual production will be described in detail below.

[0031] Four conical guide punches 1 are used in the mold, each installed in a key location on the lower mold 3. The lower mold 3, as the foundation of the entire mold, has its upper surface treated with high-precision surface grinding, with a flatness error not exceeding 0.01mm, to ensure assembly accuracy with other components. Mounting holes are provided at the four corners of the lower mold 3 for fixing the mold buffer blocks 2. The conical guide punches 1 are fixed to the lower mold 3 with bolts; their installation positions are precisely calculated to ensure accurate alignment of the upper and lower molds during mold closing. The cone angle of the conical guide punches 1 ranges from 30° to 60°, a design that ensures stability and accuracy during the guiding process. Figure 2 As shown, the conical guide block punch 1 and the conical guide block die 4 form a conical fit. Their contact surfaces are precision machined to ensure 100% contact area during mold closing, thus reducing the deviation in the upper and lower mold clearance. There are also four conical guide block dies 4, mounted on the upper mold pressure plate 5, with their installation positions corresponding to the conical guide block punch 1, ensuring precise alignment during mold closing. The cone angle of the conical guide block die 4 is consistent with that of the conical guide block punch 1, and its inner surface is hardened to a hardness range of HRC55 to HRC60 to improve wear resistance and extend service life.

[0032] Four mold buffer blocks 2 are installed at the four corners of the lower mold 3 to buffer the impact force during mold closing. The mold buffer blocks 2 are made of elastic material with an elastic modulus ranging from 5MPa to 20MPa to accommodate different closing forces. The height of the mold buffer blocks 2 is adjustable and fixed to the lower mold 3 via a threaded connection, allowing for easy adjustment of the height according to actual production needs and thus optimizing the buffering effect. The top of the mold buffer block 2 has an arc-shaped contact surface that matches the bottom plane of the pressure plate 5 to increase the contact area and disperse the closing impact force. In actual production, the height of the mold buffer blocks 2 is adjusted by rotating the adjusting nut on the outside of the buffer block, with an adjustment accuracy of 0.1mm, ensuring controllable buffering effect.

[0033] The pressure plate 5 is located below the upper mold and connected to the tapered guide block die 4. During the trimming and punching operation, it moves downwards and contacts the mold buffer block 2 to cushion the mold closing process. The bottom plane of the pressure plate 5 is hardened to a hardness range of HRC50 to HRC60 to improve its wear resistance. The thickness of the pressure plate 5 is designed to be evenly distributed to avoid deformation due to stress concentration. Guide grooves are provided around the pressure plate 5 to cooperate with the guide pillars of the upper mold 6, ensuring the stability of the pressure plate 5 during its downward movement. The width of the guide grooves matches the diameter of the guide pillars, and their inner surfaces are chrome-plated to improve wear resistance and corrosion resistance. A certain gap is reserved between the bottom plane of the pressure plate 5 and the arc-shaped contact surface of the mold buffer block 2. The size of this gap is adjusted according to the magnitude of the mold closing force to ensure optimal cushioning effect.

[0034] The upper die 6 is located at the top of the entire mold and works in conjunction with the lower die 3 to complete the trimming and punching processes. The bottom of the upper die 6 has four guide pillars, each matching the guide groove of the pressure plate 5. The outer surface of the guide pillars is chrome-plated to improve their wear resistance and corrosion resistance. The top of the upper die 6 has a mounting interface for connecting to the press's drive unit, ensuring efficient power transmission during operation. The mounting interface of the upper die 6 uses a standard thread design for easy compatibility with different types of presses.

[0035] Working Principle: The upper mold 6 begins its descent, and the conical guide block punch 1 and conical guide block die 4 first come into contact, guiding the upper and lower molds to achieve precise fit through the conical structure. At this point, the contact area between the conical guide block punch 1 and the conical guide block die 4 reaches 100%, ensuring the fit clearance between the upper and lower molds is controlled within ±0.02mm. The pressure plate 5 continues to descend with the upper mold 6 until its bottom plane contacts the top arc-shaped contact surface of the mold buffer block 2. During this process, the guide groove of the pressure plate 5 and the guide post of the upper mold 6 maintain a tight fit, ensuring the stable and unbiased movement trajectory of the pressure plate 5. The mold buffer block 2 buffers the impact force of mold closing, while the pressure plate 5 continues to apply pressure until the mold is fully closed. The elastic deformation of the mold buffer block 2 is adjusted according to the magnitude of the mold closing force to ensure optimal buffering effect. After completing the trimming and punching process, the upper mold 6 returns, the pressure plate 5 separates from the mold buffer block 2, and the mold returns to its initial state. Throughout the entire process, the cooperative design of the conical guide block punch 1 and the conical guide block die 4 significantly improved the accuracy of trimming and punching, while the design of the mold buffer block 2 effectively reduced the damage to the mold caused by the mold closing impact force.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tapered guide and buffer device for a trimming and punching die, characterized in that: The mold includes a conical guide block punch (1), a mold buffer block (2), a lower mold (3), a conical guide block die (4), a pressure plate (5), and an upper mold (6). There are four conical guide block punches (1), which are installed in key parts of the lower mold (3). There are four conical guide block dies (4), which are installed on the pressure plate (5) and form a conical fit with the conical guide block punches (1). There are four mold buffer blocks (2), which are installed at the four corners of the lower mold (3).

2. The tapered guide and buffer device for trimming and punching dies according to claim 1, characterized in that: The cone angle of the conical guide block punch (1) of the mold is in the range of 30° to 60°, and the contact area between the conical guide block punch (1) and the conical guide block die (4) reaches 100% when they are closed.

3. The tapered guide and buffer device for trimming and punching dies according to claim 2, characterized in that: The conical guide punch (1) of the mold is fixed to the lower mold (3) by bolts, and the flatness error of the upper surface of the lower mold (3) does not exceed 0.01mm.

4. The tapered guide and buffer device for trimming and punching dies according to claim 1, characterized in that: The mold buffer block (2) is made of elastic material with an elastic modulus ranging from 5MPa to 20MPa. The height of the mold buffer block (2) is adjustable and it is fixed to the lower mold (3) by a threaded connection.

5. The tapered guide and buffer device for trimming and punching dies according to claim 4, characterized in that: The top of the mold buffer block (2) is provided with an arc-shaped contact surface, which matches the bottom plane of the pressure plate (5) to increase the contact area.

6. The tapered guide and buffer device for trimming and punching dies according to claim 1, characterized in that: The bottom plane of the pressure plate (5) has a hardness range of HRC50 to HRC60, and the pressure plate (5) is provided with guide grooves around its perimeter for cooperating with the guide posts of the upper mold (6).

7. The tapered guide and buffer device for trimming and punching dies according to claim 1, characterized in that: The bottom of the upper mold (6) is provided with four guide pillars, and the top of the upper mold (6) is provided with an installation interface for connecting to the drive device of the press.

8. The tapered guide and buffer device for trimming and punching dies according to claim 1, characterized in that: The lower mold (3) of the mold has mounting holes at its four corners. The diameter of the mounting holes matches the outer diameter of the thread of the mold buffer block (2) to ensure the stability of the buffer block installation.

Images