Device and method for achieving accurate press fitting of rough machining product

Abstract

The invention relates to a device and a method for realizing accurate press fitting of a rough machining product. The pressing machine solves the technical problem that an existing pressing machine is low in pressing efficiency. Comprising a pressing machine arranged above a product, a pressing rod used for pressing a part into the product is arranged at the lower end of the pressing machine, the pressing machine is connected with a pressing machine controller, the circumferential outer side of the pressing rod is movably sleeved with a product pre-pressing seat, the product pre-pressing seat is connected with the pressing rod through an elastic supporting structure, and the lower end face of the product pre-pressing seat is provided with a product contact face located on the lower end face of the pressing rod. A displacement sensor connected with the product pre-pressing base is arranged on the outer side of the pressing rod in the circumferential direction. The device has the advantages that the height difference between different products can be obtained through the product contact surface and the displacement sensor, the extension amount of the pressing rod can be calculated and adjusted conveniently, and the production efficiency is improved. The press-fitting target displacement value of the product press can be obtained according to the calibrated press-fitting in-place press displacement value and the height difference between the products, the press-fitting efficiency is improved, and the press-fitting effect is guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of press pressing equipment, specifically relating to a device and method for achieving precise pressing of rough-machined products. Background Technology

[0002] like Figure 1 As shown, a servo electronic press is a new type of press that uses a servo motor to drive a pressure rod through a transmission mechanism to achieve the movement of the pressing fixture. Through complex electrical control, the servo press can be programmed arbitrarily, reaching specified speeds, pressures, and strokes with a pressure accuracy of 1% and a repeatability of 0.01mm. Its ease of operation and excellent precision make servo electronic presses widely used in pressing and riveting applications across various industries. Therefore, electronic servo presses are often used for high-precision component pressing. Typically, by setting a fixed and appropriate pressure rod extension position and pressure according to the pressing depth of the product, precise depth pressing can be achieved. However, if the height of the products being pressed varies significantly, the press rod can only press to a fixed position, failing to ensure that the parts are pressed to the same position relative to the product itself. Furthermore, each production run requires manual adjustment of the pressure rod extension based on the product height, resulting in low production efficiency. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a device for precise press-fitting of rough-machined products.

[0004] Another objective of this invention is to provide a method for achieving precise press-fitting of rough-machined products, addressing the aforementioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An apparatus for precise press-fitting of rough-machined products includes a press positioned above the product. The lower end of the press has a pressure rod for pressing parts into the product. The press is connected to a press controller. A product pre-pressing seat is movably sleeved on the outer side of the pressure rod. The product pre-pressing seat is connected to the pressure rod via an elastic support structure, and the lower end face of the product pre-pressing seat has a product contact surface located on the lower end face of the pressure rod. A displacement sensor connected to the product pre-pressing seat is provided on the outer side of the pressure rod. The displacement sensor can acquire the displacement distance value when the product contact surface contacts the upper end of the product. The height difference between the displacement distance value and the calibrated product displacement distance value can be used to obtain the lowering height of the pressure rod, making it suitable for products of different heights. The elastic support mechanism can buffer the product pre-pressing seat and automatically reset it, improving measurement efficiency and thus increasing product production efficiency.

[0006] In the device for realizing accurate press-fitting of rough machining products, the circumferential outer side of the pressing rod is provided with a pressing rod seat above the product pre-pressing seat, and the pressing rod seat is integrated with the pressing rod, so that the displacement sensor can be conveniently placed through the pressing rod seat, and the integrated structure can improve the structural strength of the pressing rod seat and prolong the service life.

[0007] In the device for realizing accurate press-fitting of rough machining products, the displacement sensor is fixedly installed on the pressing rod seat, and one end of the movable measuring rod of the displacement sensor is connected to the upper end of the product pre-pressing seat. By connecting the movable measuring rod to the product pre-pressing seat, the displacement distance of the product pre-pressing seat at different heights can be obtained, which facilitates users to obtain the displacement distance at different product height differences and improves the press-fitting efficiency.

[0008] In the device for realizing accurate press-fitting of rough machining products, the elastic support structure includes a plurality of strong springs arranged on the circumferential outer side of the pressing rod, one end of each strong spring is connected to the pressing rod seat, and the other end is connected to the upper end of the product pre-pressing seat. The strong spring can buffer the product pre-pressing seat, prolong the service life of the product pre-pressing seat, and automatically reset the product pre-pressing seat when the product press-fitting is completed.

[0009] In the device for realizing accurate press-fitting of rough machining products, the product pre-pressing seat includes a pre-pressing cylindrical portion in the shape of a cylinder and sleeved on the circumferential outer side of the pressing rod. The pre-pressing cylindrical portion has a pre-pressing annular portion extending towards the inside of the pre-pressing cylindrical portion on the circumferential inner side of the upper end of the pre-pressing cylindrical portion, and the product contact surface is formed on the lower end surface of the pre-pressing cylindrical portion. The pre-pressing cylindrical portion can facilitate the abutting arrangement of the product pre-pressing seat and the strong spring, the product contact surface is arranged on the pre-pressing annular portion, and the pre-pressing annular portion facilitates the measurement of the product height.

[0010] In the device for realizing accurate press-fitting of rough machining products, the press machine is a servo electronic press machine, and the displacement sensor is a resistance displacement sensor or an LVDT displacement sensor.

[0011] A method for realizing accurate press-fitting of rough machining products, the method comprising the following steps: Step S1, device calibration mode: obtaining the calibration pre-pressing displacement sensor value of a standard size product and the calibration press-fitting displacement value of the press machine; Step S2, daily production mode: obtaining the product pre-pressing displacement sensor value of a production product, calculating the product press-fitting target displacement value S of the product, and press-fitting the product according to the target displacement.

[0012] In the method for realizing accurate press-fitting of rough machining products, the specific steps of the device calibration mode in step S1 include: Put in standard product, the press drives the compression rod to move towards the standard product direction, when the product contact surface and the upper end surface of the standard product completely remove, the press reaches the pre-pressing position, obtains the standard size product calibration pre-pressing displacement sensor value a, the press is compressed to the standard product, obtains the calibration compression to the press displacement value A after the calibration ends.

[0013] In the above-mentioned method for realizing accurate compression of rough machining products, the specific steps of the equipment calibration mode in step S2 include: Put in production product, the press drives the compression rod to move towards the production product direction, when the product contact surface and the upper end surface of the production product completely remove, the press reaches the pre-pressing position, obtains the production product pre-pressing displacement sensor value b, calculates the production product press compression target displacement value S according to the calibration pre-pressing displacement sensor value a, the calibration compression to the press displacement value A and the production product pre-pressing displacement sensor value b, transmits to the press controller through industrial communication technology, and the press is compressed according to the calculated production product press compression target displacement value S.

[0014] In the above-mentioned method for realizing accurate compression of rough machining products, the specific steps of the equipment calibration mode in step S2 include: According to the calibration pre-pressing displacement sensor value a and the calibration compression to the press displacement value A, the height difference △h=b-a between the production product and the calibration product is calculated, and the production product press compression target displacement value S when the production product is compressed to the same depth as the calibration product is calculated according to the height difference △h and the calibration compression to the press displacement value A, that is, S=A-△h.

[0015] Compared with the prior art, the present application has the following advantages: 1. The height difference between different products can be obtained through the product contact surface and the displacement sensor, the extension amount of the compression rod can be calculated and adjusted, and the production efficiency is improved. 2. The elastic supporting structure can play a buffering role on the product pre-pressing seat, and can drive the measured product pre-pressing seat to automatically reset, improving the measurement efficiency. 3. The production product press compression target displacement value can be obtained according to the calibration compression to the press displacement value and the height difference between the products, the compression efficiency is improved, and the compression effect is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic diagram of the prior art; Figure 2 is a structural schematic diagram of the present application; Figure 3 is a flowchart of the present application.

[0017] In the figure: product 1, press 2, press rod 21, press rod seat 211, product pre-press seat 3, product contact surface 31, pre-press cylindrical part 32, pre-press annular part 33, elastic support structure 4, strong spring 41, displacement sensor 5, movable measuring rod 51, product press assembly target displacement value S, calibration pre-press displacement sensor value a, calibration assembly in place press displacement value A, product pre-press displacement sensor value b, height difference Δh. DETAILED DESCRIPTION

[0018] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0019] As shown in Figure 2 , Figure 3 , the device for realizing accurate assembly of rough machining products comprises a press 2 arranged above the product 1, the lower end of the press 2 is provided with a press rod 21 for pressing the part into the product 1, the press 2 is connected with a press controller, the circumferential outer side of the press rod 21 is movably sleeved with a product pre-press seat 3, the product pre-press seat 3 is connected with the press rod 21 through an elastic support structure 4, and the lower end surface of the product pre-press seat 3 is provided with a product contact surface 31 located on the lower end surface of the press rod 21, the circumferential outer side of the press rod 21 is provided with a displacement sensor 5 connected with the product pre-press seat 3, the displacement distance value when the product contact surface 31 contacts the upper end of the product 1 can be obtained through the displacement sensor 5, the press rod 21 descending height of the press 2 can be obtained through the height difference between the displacement distance value of the calibrated product 1, the press rod 21 can be adapted to products of different heights, the product pre-press seat 3 can be buffered through the elastic support structure 4, and the product pre-press seat 3 can be automatically reset, the measurement efficiency is improved, and thus the production efficiency of the product 1 is improved.

[0020] Specifically, the circumferential outer side of the press rod 21 is provided with a press rod seat 211 located above the product pre-press seat 3, and the press rod seat 211 is connected with the press rod 21 in an integral structure, the displacement sensor 5 can be placed through the press rod seat 211, and the integral structure can improve the structural strength of the press rod seat 211 and prolong the service life.

[0021] Among them, the displacement sensor 5 is installed and fixed on the press rod seat 211, and one end of the movable measuring rod 51 of the displacement sensor 5 is connected with the upper end of the product pre-press seat 3, the displacement distance of the product pre-press seat 3 under different heights can be obtained through the connection of the movable measuring rod 51 and the product pre-press seat 3, the displacement distance under the height difference of different products 1 can be obtained by the user, and the assembly efficiency is improved.

[0022] As shown in Figure 2 , Figure 3As shown, the elastic support structure 4 includes several strong springs 41 arranged on the outer side of the pressing rod 21 in the circumferential direction, one end of each strong spring 41 is connected with the pressing rod seat 211 and the other end is connected with the upper end of the product pre-pressing seat 3, the strong spring 41 can buffer the product pre-pressing seat 3, improve the service life of the product pre-pressing seat 3, and drive the product pre-pressing seat 3 to automatically reset when the product 1 is finished.

[0023] Further, the product pre-pressing seat 3 includes a pre-pressing cylindrical portion 32 which is cylindrical and is sleeved on the outer side of the pressing rod 21 in the circumferential direction, the pre-pressing cylindrical portion 32 has a pre-pressing annular portion 33 extending towards the inside of the pre-pressing cylindrical portion 32 on the inner side of the upper end of the pre-pressing cylindrical portion 32, and the product contact surface 31 is formed on the lower end surface of the pre-pressing cylindrical portion 32, the pre-pressing cylindrical portion 32 can facilitate the abutting arrangement of the product pre-pressing seat 3 and the strong spring 41, the product contact surface 31 is arranged on the pre-pressing annular portion 33, and the pre-pressing annular portion 33 facilitates the measurement of the height of the product 1.

[0024] Among them, the press 2 is a servo electronic press, and the displacement sensor 5 is a resistance displacement sensor or an LVDT displacement sensor.

[0025] In combination Figure 2 , Figure 3 As shown, a method for accurately pressing a rough machining product, the method comprises the following steps: Step S1, equipment calibration mode: obtaining the displacement sensor 5 value of the standard size product 1 at the calibration pre-pressing time and the press 2 displacement value of the calibration pressing into position; Step S2, daily production mode: obtaining the displacement sensor 5 value of the product 1 at the product 1 pre-pressing time, calculating the product press pressing target displacement value S of the product 1, and pressing the product 1 according to the target displacement.

[0026] Among them, the specific steps of the equipment calibration mode in step S1 include: Put in the standard product 1, the press 2 drives the pressing rod 21 to move towards the standard product 1, when the product contact surface 31 and the upper end surface of the standard product 1 are completely released, the press 2 reaches the pre-pressing position, the displacement sensor value a of the standard size product 1 at the calibration pre-pressing time is obtained, the press 2 presses the standard product 1, and the calibration ends after obtaining the calibration pressing into position press displacement value A.

[0027] Specifically, the specific steps of the equipment calibration mode in step S2 include: Put into production product 1, the press 2 drives the pressure rod 21 to move towards the direction of production product 1, when the product contact surface 31 and the upper end surface of production product 1 are completely released, the press 2 reaches the pre-pressing position, obtains the product pre-pressing displacement sensor value b of production product 1, calculates the product presser displacement target value S of production product 1 according to the calibration pre-pressing displacement sensor value a, the calibration presser displacement value A and the product pre-pressing displacement sensor value b, and transmits it to the press controller through industrial communication technology, and the press 2 presses production product 1 according to the calculated product presser displacement target value S.

[0028] In combination Figure 2 , Figure 3 As shown in the figure, the product 1 presser displacement target value calculation method of production product 1 in step S2 includes: According to the calibration pre-pressing displacement sensor value a and the calibration presser displacement value A, the height difference △h=b-a between production product 1 and calibration product 1 is calculated, and the product presser displacement target value S of production product 1 when pressed to the same depth as calibration product 1 is calculated according to the height difference △h and the calibration presser displacement value A, that is, S=A-△h.

[0029] The principle of this embodiment is that: by controlling the pressure rod 21 to make the product contact surface 31 of the product pre-pressing seat 3 contact the calibration product 1 to obtain the calibration pre-pressing displacement sensor value a, and then controlling the pressure rod 21 to continue pressing, the calibration presser displacement value A is obtained; by controlling the pressure rod 21 to make the product contact surface 31 of the product pre-pressing seat 3 contact the production product 2 to obtain the product pre-pressing displacement sensor value b, the height difference △h between production product 1 and calibration product 1 can be obtained by subtracting the calibration pre-pressing displacement sensor value a from the product pre-pressing displacement sensor value b, and the product presser displacement target value S can be obtained by subtracting the height difference from the calibration presser displacement value A, that is, the pressing extension amount of the pressure rod 21 can be adjusted according to the height of different products 1, the production efficiency is improved, and the pressing effect is guaranteed.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

[0031] Although the terms product 1, press 2, press rod 21, press rod seat 211, product pre-press seat 3, product contact surface 31, pre-press cylindrical portion 32, pre-press annular portion 33, elastic support structure 4, strong spring 41, displacement sensor 5, movable measuring rod 51, product press press-fitting target displacement value S, calibration pre-press time displacement sensor value a, calibration press-fitting in-place press displacement value A, product pre-press time displacement sensor value b, height difference Ah, and the like are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of the present application; any interpretation of them as an additional limitation is contrary to the spirit of the present application.

Claims

1. An apparatus for precise press-fitting of rough-machined products, comprising a press (2) disposed above a product (1), the lower end of the press (2) having a pressure bar (21) for pressing parts into the product (1), the press (2) being connected to a press controller, characterized in that, The pressure rod (21) is movably sleeved with a product pre-pressure seat (3) on its outer circumference. The product pre-pressure seat (3) is connected to the pressure rod (21) through an elastic support structure (4). The lower end face of the product pre-pressure seat (3) has a product contact surface (31) located on the lower end face of the pressure rod (21). The pressure rod (21) is provided with a displacement sensor (5) connected to the product pre-pressure seat (3) on its outer circumference.

2. The apparatus for precise pressing of rough-machined products according to claim 1, characterized in that, The pressure rod (21) has a pressure rod seat (211) located above the product pre-pressure seat (3) on its outer circumferential side, and the pressure rod seat (211) and the pressure rod (21) are integrated into one structure.

3. The apparatus for precise pressing of rough-machined products according to claim 2, characterized in that, The displacement sensor (5) is mounted and fixed on the pressure rod seat (211), and one end of the movable measuring rod (51) of the displacement sensor (5) is connected to the upper end of the product pre-pressure seat (3).

4. The apparatus for precise pressing of roughly machined products according to claim 2 or 3, characterized in that, The elastic support structure (4) includes several strong springs (41) arranged on the outer side of the pressure rod (21). One end of each strong spring (41) is connected to the pressure rod seat (211) and the other end is connected to the upper end of the product pre-pressure seat (3).

5. The apparatus for precise pressing of rough-machined products according to claim 1, characterized in that, The product pre-compression seat (3) includes a pre-compression cylindrical part (32) that is cylindrical and sleeved on the outer side of the pressure rod (21). The upper end of the pre-compression cylindrical part (32) has a pre-compression annular part (33) extending toward the inner side of the pre-compression cylindrical part (32), and the product contact surface (31) is formed on the lower end face of the pre-compression cylindrical part (32).

6. The apparatus for precise pressing of rough-machined products according to claim 1, characterized in that, The press (2) is a servo electronic press, and the displacement sensor (5) is a resistive displacement sensor or an LVDT displacement sensor.

7. A method for precisely pressing a roughly machined product using the apparatus for precisely pressing a roughly machined product as described in any one of claims 1-6, characterized in that, This method includes the following steps: Step S1, Equipment Calibration Mode: Obtain the displacement sensor (5) value and the displacement value of the press (2) during the calibration pre-compression of the standard size product (1); Step S2, Daily Production Mode: Obtain the displacement sensor (5) value when the product (1) is pre-pressed, calculate the product press target displacement value S of the product (1), and press the product (1) according to the target displacement.

8. The method for achieving precise press-fitting of rough-machined products according to claim 7, characterized in that, The specific steps of the device calibration mode in step S1 include: Place the standard product (1) in the press (2), drive the pressure rod (21) to move toward the standard product (1), and when the product contact surface (31) is completely separated from the upper surface of the standard product (1), the press (2) reaches the pre-press position, obtain the displacement sensor value a of the standard size product (1) during the calibration pre-press, press (2) presses the standard product (1), and obtain the press displacement value A of the calibration press in place before the calibration ends.

9. A method for achieving precise press-fitting of rough-machined products according to claim 8, characterized in that, The specific steps of the device calibration mode in step S2 include: When the product (1) is placed in the press, the press (2) drives the pressure rod (21) to move toward the product (1). When the product contact surface (31) is completely separated from the upper surface of the product (1), the press (2) reaches the pre-press position and obtains the product pre-press displacement sensor value b. Based on the calibrated pre-press displacement sensor value a, the calibrated press displacement value A, and the product pre-press displacement sensor value b, the product press press target displacement value S of the product (1) is calculated and transmitted to the press controller through industrial communication technology. The press (2) presses the product (1) according to the calculated product press press target displacement value S.

10. A method for achieving precise press-fitting of rough-machined products according to claim 9, characterized in that, The method for calculating the target displacement value of the product (1) press (2) in step S2 for producing product (1) includes: Based on the displacement sensor value a during the calibration pre-pressing and the displacement value A of the press when the product is pressed into place, the height difference Δh = ba between the produced product (1) and the calibrated product (1) is calculated. Based on the height difference Δh and the displacement value A of the press when the product is pressed into place, the target displacement value S = A - Δh of the press when the produced product (1) is pressed into place to the same depth as the calibrated product (1) is calculated.

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