Press fitting device with pressure monitoring function

Abstract

The utility model discloses a press-fitting device with a pressure monitoring function, which comprises a press body, a press-fitting station is arranged below the press body, a press-in tool is arranged on the press-fitting station, a pressure sensor is arranged on the upper end face of the press-in tool, and a pressure sensor is arranged on the lower end face of the press-in tool. The pressure sensor is electrically connected with a pressure displayer arranged on the press body and used for measuring the pressure value during press fitting, and a driving mechanism is arranged above the press-in tool and used for press fitting of a cam shaft workpiece arranged in the press-in tool. According to the press-in tool, the pressure sensor is arranged on the press-in tool, when a gear at the upper end of a cam shaft workpiece is subjected to press fitting, the magnitude of interference between a shaft and the gear is converted into a pressure value, the magnitude of interference can be monitored in real time according to the magnitude of the pressure value in the press fitting process, unqualified products can be removed in time, and then the percent of pass of the products is improved.

Description

Technical Field

[0001] The utility model belongs to the field of camshaft processing, and in particular relates to a press-fitting device with a pressure monitoring function. Background Art

[0002] The camshaft is a component in a piston engine, and its function is to control the opening and closing of the valve. With the design requirements of high engine speed, high output power, low fuel additives, and low cost investment. The camshaft workpiece 100 includes a shaft 120 and a gear plate 110 pressed on the shaft 120. At the same time, a gear 130 needs to be pressed on the upper end of the shaft 120 for connecting the external structure. The shaft 120 and the gear 130 are interference fit. In order to ensure that the camshaft workpiece 100 reaches the required torque, the minimum interference between the shaft 120 and the gear 130 is specified to reach 0.03mm. Therefore, the pressure value required for the corresponding press fitting is 5000 Newtons. However, the press fitting device in the prior art cannot accurately detect that the minimum interference of the camshaft workpiece 100 after press fitting is not less than 0.03mm when the gear 130 is press fitted, resulting in a low product qualification rate. Utility Model Content

[0003] In view of the above-mentioned deficiencies, the purpose of the utility model is to provide a press-fitting device with a pressure monitoring function, which solves the problem in the prior art that when the gear of the camshaft workpiece is press-fitted, the size of the interference fit cannot be monitored in real time, resulting in a low product qualification rate.

[0004] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0005] A press-fitting device with a pressure monitoring function comprises a press body, a press-fitting station is arranged below the press body, a press-fitting tool is arranged on the press-fitting station, a pressure sensor is arranged on the upper end surface of the press-fitting tool, and the pressure sensor is electrically connected to a pressure display arranged on the press body for the pressure value during press-fitting, and a driving mechanism is arranged above the press-fitting tool to press-fit a camshaft workpiece arranged in the press-fitting tool.

[0006] By adopting the above-mentioned structural design and arranging a pressure sensor on the pressing tooling, the pressure value of the pressing can be monitored in real time when the gear on the upper end of the camshaft workpiece is press-fitted. The pressure value of an interference fit of 0.03 mm is 5000 N. When the pressure value is less than 5000 N, it indicates that the camshaft workpiece is unqualified. Therefore, when the gear is press-fitted by the pressing device, the interference fit can be monitored in real time, and unqualified products can be removed in time, thereby improving the product qualification rate.

[0007] As a further improvement, the pressing tooling includes an upper seat and a lower seat, and the upper seat and the lower seat are connected by a guide column, and a spring is provided on the outer sleeve of the guide column. The pressure sensor is fixedly mounted on the upper seat, and the lower seat is fixedly mounted on the pressing station, and a fixed seat for installing the camshaft workpiece is provided on the lower seat.

[0008] With the above structural design, the fixing seat can fix the lower end of the camshaft workpiece, and the driving mechanism drives the upper seat to move up and down to press the gear, and the spring can play a role of buffering and resetting.

[0009] As a further improvement, the fixed seat includes a multi-layer limit plate, one side of the limit plate is provided with a limit groove inwardly, and a limit hole is provided on the lower seat corresponding to the bottom of the limit groove, and the upper end of the upper limit plate is provided with a semicircular limit member for limiting the gear plate of the camshaft workpiece.

[0010] As a further improvement, the opening end of the limiting groove is designed to be arc-shaped.

[0011] The above structural design is adopted to facilitate the installation and fixation of the camshaft workpiece and facilitate the subsequent press-fitting processing.

[0012] As a further improvement, a connecting plate is fixedly mounted on the upper end surface of the upper seat, and the pressure sensor is detachably mounted on the connecting plate.

[0013] The above structural design facilitates the disassembly, assembly, maintenance and replacement of the pressure sensor.

[0014] As a further improvement, both ends of the upper seat are provided with through holes, the lower end of the through hole is connected to a guide sleeve, the lower end of the guide column is fixed on the lower seat, and the upper end moves through the guide sleeve and the through hole, and the upper and lower ends of the spring respectively press against the guide sleeve and the lower seat.

[0015] As a further improvement, a press-fitting block is provided at the lower end of the upper seat, and a avoidance hole is opened in the middle of the press-fitting block corresponding to the axis of the camshaft workpiece.

[0016] With the above structural design, the avoidance hole opened in the middle of the press-fitting block is used for press-fitting the camshaft workpiece, and the upper end of the shaft has movable space, which is convenient for pressing the gear downward.

[0017] As a further improvement, a control panel is provided on one side of the press body, and the pressing device controls the driving mechanism to move up and down through a PLC control system.

[0018] As a further improvement, the driving mechanism includes a driving head and an adjusting plate detachably mounted on the driving head, and a pressing head with a circular structure is integrally formed at the lower end of the adjusting plate.

[0019] As a further improvement, a T-shaped mounting groove is provided at the lower end of the driving head, and the adjusting plate is fixedly mounted on the driving head by means of T-shaped bolts.

[0020] By adopting the above structural design, the position of the press fitting head can be adjusted to ensure that the press fitting head is located directly above the pressure sensor, thereby ensuring the accuracy of the pressure data.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] 1. The utility model provides a pressure sensor on the press-fitting tooling, and converts the interference between the shaft and the gear into a pressure value when the gear on the upper end of the camshaft workpiece is press-fitted. The interference can be monitored in real time by the pressure value during press-fitting, and unqualified products can be removed in time, thereby improving the qualified rate of products;

[0023] 2. The fixing seat of the utility model is provided with a limiting groove and a limiting hole. The opening end of the limiting groove is designed in an arc shape. The upper end of the limiting plate of the upper layer is provided with a limiting piece of a semicircular structure for limiting the gear plate of the camshaft workpiece. Therefore, when the camshaft workpiece is installed and fixed, the installation is convenient, and the force is evenly applied through the multi-point fixing method, and the shaft and the gear plate will not be damaged, thereby ensuring the press-fitting quality of the product;

[0024] 3. The adjustment plate of the driving mechanism of the utility model is fixedly installed in the T-shaped mounting groove of the driving head by T-shaped bolts, and the position of the pressing head can be adjusted to ensure that the pressing head is located directly above the pressure sensor to ensure the accuracy of the pressure data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of the utility model;

[0027] Figure 2 yes Figure 1 A three-dimensional view of the press-in tooling;

[0028] Figure 3 yes Figure 1 Front view of the press-in tooling.

[0029] Camshaft workpiece 100, gear plate 110, shaft 120, gear 130, press body 1, control panel 1a, press-fitting station 2, press-fitting tooling 3, pressure sensor 3a, upper seat 3b, through hole 31b, guide sleeve 32b, lower seat 3c, guide column 3d, spring 3e, fixed seat 3f, limit plate 31f, limit groove 32f, limit hole 33f, limit member 34f, press-fitting block 3g, avoidance hole 31g, pressure display 4, drive mechanism 5, drive head 5a, T-shaped mounting groove 51a, T-bolt 52a, adjustment plate 5b, press-fitting head 5c, connecting plate 6. DETAILED DESCRIPTION

[0030] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0031] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] See also Figure 1 , Figure 2 and Figure 3A press-fitting device with a pressure monitoring function comprises a press body 1, a press-fitting station 2 is provided below the press body 1, a press-fitting tool 3 is provided on the press-fitting station 2, and the press-fitting tool 3 is installed on the press-fitting station 2 in an adjustable position. A pressure sensor 3a is provided on the upper end surface of the press-fitting tool 3, and the pressure sensor 3a is electrically connected to a pressure display 4 provided on the press body 1 for the pressure value during press-fitting, and a driving mechanism 5 is provided above the press-fitting tool 3 to press-fit the camshaft workpiece 100 installed in the press-fitting tool 3. A control panel 1a is provided on one side of the press body 1, and the press-fitting device controls the driving mechanism 5 to move up and down through a PLC control system. This application is mainly aimed at the press-fitting of the gear 130 at the upper end of the camshaft workpiece 100. Since the press-fitting of the shaft 120 and the gear 130 adopts interference fit, and the minimum interference amount cannot be less than 0.03mm, in order to ensure the torque requirement of the camshaft workpiece 100, the interference amount is converted during the detection. The pressure value corresponding to the minimum interference amount of 0.03mm is 5000 Newtons. Therefore, the detection of the interference amount is converted into the detection of the pressure value. If the pressure value during the pressing process is less than the standard value of 5000 Newtons, the camshaft workpiece 100 is judged to be unqualified. Therefore, in this scheme, a pressure sensor 3a is set at the upper end of the pressing tool 3 to monitor the pressure during the pressing process. If the pressure value during the pressing process is less than 5000 Newtons, it means that the interference amount of the fit between the shaft 120 and the gear 130 is less than 0.03mm, which is unqualified. Therefore, this scheme can detect the interference amount during the press-fitting process of the gear 130, thereby improving the quality of the product.

[0033] Please continue reading Figure 2 and Figure 3Specifically, the press-fitting tool 3 includes an upper seat 3b and a lower seat 3c, and the upper seat 3b and the lower seat 3c are connected by a guide column 3d, and a spring 3e is provided on the outer sleeve of the guide column 3d. The pressure sensor 3a is fixedly mounted on the upper seat 3b. During installation, a connecting plate 6 is fixedly mounted on the upper end surface of the upper seat 3b, and the pressure sensor 3a is detachably mounted on the connecting plate 6. The lower seat 3c is fixedly mounted on the press-fitting station 2, and a fixed seat 3f for mounting the camshaft workpiece 100 is provided on the lower seat 3c. In this embodiment, the fixed seat 3f includes a multi-layered limiting plate 31f, and a limiting groove 32f is opened inward on one side of the limiting plate 31f. The open end of the limiting groove 32f is designed to be arc-shaped to facilitate the loading and unloading of the camshaft workpiece 100, and a limiting hole 33f is opened on the lower seat 3c corresponding to the bottom of the limiting groove 32f. The upper end of the upper limiting plate 31f is provided with a semicircular structure limiting member 34f for limiting the gear disk 110 of the camshaft workpiece 100. The design of the semicircular structure limiting member 34f is mainly aimed at the installation of the gear disk 110 of the camshaft workpiece 100 to limit it, and at the same time cooperates with the multi-point fixing method of the limiting groove 32f and the limiting hole 33f to ensure the stability of the camshaft workpiece 100 during press assembly and prevent offset.

[0034] Both ends of the upper seat 3b are provided with through holes 31b, and the lower end of the through hole 31b is connected to a guide sleeve 32b. The lower end of the guide column 3d is fixed to the lower seat 3c, and the upper end moves through the guide sleeve 32b and the through hole 31b. The upper and lower ends of the spring 3e are respectively pressed against the guide sleeve 32b and the lower seat 3c. A press block 3g is provided at the lower end of the upper seat 3b, and a avoidance hole 31g is provided in the middle of the press block 3g corresponding to the shaft 120 of the camshaft workpiece 100.

[0035] Please continue reading Figure 1 The driving mechanism 5 includes a driving head 5a and an adjusting plate 5b detachably mounted on the driving head 5a, and a circular pressing head 5c is integrally formed at the lower end of the adjusting plate 5b. A T-shaped mounting groove 51a is provided at the lower end of the driving head 5a, and the adjusting plate 5b is fixedly mounted on the driving head 5a by a T-shaped bolt 52a.

[0036] Working principle of this utility model:

[0037] See also Figure 1 and Figure 2When the camshaft 100 needs to be press-fitted, the camshaft workpiece 100 is first installed in the fixing seat 3f, the lower end of the shaft 120 is installed in the limiting hole 33f, the gear plate 110 contacts the limiting plate 31f, and is limited by the limiting member 34f. The camshaft workpiece 100 is fixed at multiple points, and then the gear to be press-fitted is placed on the upper end of the shaft 120. At the same time, the device is started, and the driving mechanism 5 moves downward through the driving head 5a and the pressing head 5c and contacts the pressure sensor 3a. Continue to press down, the upper seat 3b of the press-fitting tool 3 moves downward and completes the press-fitting of the gear 130 onto the shaft 120 through the press-fitting block 3g. During the press-fitting process, the pressure value during press-fitting can be read through the pressure display 4, and when 0.03mm is the minimum interference, the corresponding pressure value is 5000N. When it is less than 5000N, it means that the interference is less than 0.03mm and the product is unqualified. Therefore, through the press-fitting equipment, pressure monitoring can be performed when the camshaft workpiece is press-fitted, thereby improving product quality.

[0038] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementations disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model. Other devices that are the same or similar to them are all within the protection scope of the utility model.

Claims

1. A press-fitting device with a pressure monitoring function, characterized in that: The invention comprises a press body (1), a press-fitting station (2) is provided below the press body (1), a press-fitting tool (3) is provided on the press-fitting station (2), a pressure sensor (3a) is provided on the upper end surface of the press-fitting tool (3), and the pressure sensor (3a) is electrically connected to a pressure display (4) provided on the press body (1) for measuring the pressure value during press-fitting, and a driving mechanism (5) is provided above the press-fitting tool (3) for press-fitting a camshaft workpiece (100) installed in the press-fitting tool (3).

2. A press-fitting device with a pressure monitoring function according to claim 1, characterized in that: The press-fitting tool (3) comprises an upper seat (3b) and a lower seat (3c), and the upper seat (3b) and the lower seat (3c) are connected via a guide column (3d), and a spring (3e) is provided on the outer sleeve of the guide column (3d). The pressure sensor (3a) is fixedly mounted on the upper seat (3b), and the lower seat (3c) is fixedly mounted on the press-fitting station (2), and a fixed seat (3f) for mounting a camshaft workpiece (100) is provided on the lower seat (3c).

3. A press-fitting device with a pressure monitoring function as claimed in claim 2, characterized in that: The fixing seat (3f) comprises a multi-layered limiting plate (31f), a limiting groove (32f) is provided inwardly on one side of the limiting plate (31f), and a limiting hole (33f) is provided on the lower seat (3c) corresponding to the bottom of the limiting groove (32f), and a limiting piece (34f) with a semicircular structure is provided at the upper end of the upper limiting plate (31f) for limiting the gear plate (110) of the camshaft workpiece (100).

4. A press-fitting device with a pressure monitoring function as claimed in claim 3, characterized in that: The opening end of the limiting groove (32f) is designed to be arc-shaped.

5. A press-fitting device with a pressure monitoring function as claimed in claim 2, characterized in that: A connecting plate (6) is fixedly mounted on the upper end surface of the upper seat (3b), and the pressure sensor (3a) is detachably mounted on the connecting plate (6).

6. A press-fitting device with a pressure monitoring function as claimed in claim 2, characterized in that: Both ends of the upper seat (3b) are provided with through holes (31b) extending therethrough, the lower end of the through hole (31b) is connected to a guide sleeve (32b), the lower end of the guide column (3d) is fixed to the lower seat (3c), and the upper end is movable through the guide sleeve (32b) and the through hole (31b), and the upper and lower ends of the spring (3e) respectively press against the guide sleeve (32b) and the lower seat (3c).

7. A press-fitting device with a pressure monitoring function as claimed in claim 2, characterized in that: A press-fitting block (3g) is provided at the lower end of the upper seat (3b), and a relief hole (31g) is provided in the middle of the press-fitting block (3g) corresponding to the shaft (120) of the camshaft workpiece (100).

8. The press-fitting device with pressure monitoring function according to claim 1, characterized in that: A control panel (1a) is provided on one side of the press body (1), and the pressing device controls the driving mechanism (5) to move up and down via a PLC control system.

9. A press-fitting device with a pressure monitoring function according to claim 1 or 8, characterized in that: The driving mechanism (5) comprises a driving head (5a) and an adjusting plate (5b) detachably mounted on the driving head (5a); a pressing head (5c) with a circular structure is integrally formed at the lower end of the adjusting plate (5b).

10. The press-fitting device with pressure monitoring function according to claim 9, characterized in that: A T-shaped mounting groove (51a) is provided at the lower end of the driving head (5a), and the adjusting plate (5b) is fixedly mounted on the driving head (5a) via a T-shaped bolt (52a).

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