Workpiece press-fitting positioning tool

Abstract

The workpiece press-fitting positioning tool comprises a base, a positioning table used for positioning a workpiece is arranged on the base, a center positioning pin is arranged in the center of the upper end face of the positioning table, the upper end face of the positioning table is slidably connected with a movable positioning pin, and an adjusting groove allowing the movable positioning pin to horizontally slide is formed in the upper side of the positioning table. The length direction of the adjusting groove is arranged in the radial direction of the center positioning pin, and an adjusting assembly is arranged in the adjusting groove and used for adjusting the position of the movable positioning pin. A buffering assembly is arranged between the positioning table and the base and used for avoiding the situation that the positioning tool is damaged due to the fact that hydraulic force is too large when the workpiece is pressed. By adjusting the position of the movable positioning pin, the axis distance between the central positioning pin and the movable positioning pin is changed so as to adapt to positioning of workpieces of different models, and the applicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning tooling, in particular to a workpiece press-fitting positioning tooling. Background Art

[0002] Workpiece press-fitting is a processing process in which an object is fixed to another object by mechanical force or hydraulic force. When the diesel engine side cover is press-fitted, it is generally necessary to position the diesel engine side cover first. The traditional positioning tooling includes a positioning table. The upper end face of the positioning table is fixed with a center locating pin corresponding to the crankshaft seat hole on the diesel engine side cover, and a side locating pin corresponding to the bearing slot hole on the side of the crankshaft seat hole on the diesel engine side cover. When the workpiece needs to be positioned, the workpiece is placed on the positioning table, and then the center locating pin and the side locating pin are respectively inserted into the crankshaft seat hole and the bearing slot hole on the workpiece to achieve positioning.

[0003] Since the positions of the crankshaft seat holes and bearing slot holes on the side covers of different types of diesel engines are different, and the center locating pins and side locating pins on the traditional positioning tooling are set for a certain type of diesel engine side cover, the traditional positioning tooling is only suitable for the diesel engine side cover of this model. If another type of workpiece needs to be processed, the positioning table or another processing equipment needs to be replaced, which is not only very troublesome to operate, but also increases the equipment cost. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide a workpiece press-fitting and positioning tool so as to position workpieces of different models.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A workpiece press-fitting positioning tool comprises a base, a positioning platform for positioning the workpiece is provided on the base, a center positioning pin is provided at the center of the upper end surface of the positioning platform, a movable positioning pin is slidably connected to the upper end surface of the positioning platform, an adjustment groove for horizontal sliding of the movable positioning pin is provided on the upper side of the positioning platform, the length direction of the adjustment groove is arranged along the radial direction of the center positioning pin, an adjustment component is provided in the adjustment groove, and the adjustment component is used to adjust the position of the movable positioning pin; a buffer component is provided between the positioning platform and the base.

[0007] Principle of the utility model:

[0008] When in use, the distance between the two axial centers of the crankshaft seat hole and the bearing slot hole on the workpiece is obtained according to the model of the workpiece to be processed, and then the axis of the center locating pin is taken as the origin, and the movable locating pin is adjusted to the appropriate position through the adjustment component, so that the axial center distance between the center locating pin and the movable locating pin is equal to the distance between the two axial centers of the crankshaft seat hole and the bearing slot hole, and then the crankshaft seat hole and the bearing slot hole on the workpiece are respectively aligned and the center locating pin and the movable locating pin are inserted to achieve positioning.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The movable locating pin in the present solution can be adjusted in position by means of an adjusting component to change the axial center distance between the center locating pin and the movable locating pin, thereby adapting to workpieces of different types. Compared with the traditional positioning tooling which is only suitable for a certain type of workpiece, the present solution is applicable to a wider range of workpieces and has strong practicality. When processing workpieces of different types, there is no need to replace the positioning table or another processing equipment, only the position of the movable locating pin needs to be adjusted, which is convenient to use and can save equipment costs. In addition, a buffer component is provided between the positioning table and the base, which can prevent the positioning tooling from being damaged due to excessive hydraulic pressure when the workpiece is pressed.

[0011] As a preferred embodiment of the utility model, the adjustment assembly includes a screw rod, one end of which is rotatably connected to one end of the adjustment slot near the center positioning pin, the other end of the screw rod passes through the adjustment slot and is rotatably connected to the adjustment slot, and a slider that matches the adjustment slot is threadedly connected to the screw rod, and the slider is fixed to the movable positioning pin. In this solution, by rotating the screw rod, the screw rod drives the slider to move horizontally along the screw rod, the slider is fixed to the movable positioning pin, and then drives the movable positioning pin to move horizontally to adjust the position of the movable positioning pin. In this solution, the screw rod is driven, and the self-locking property of the screw rod makes it unnecessary to set up a locking structure for the adjustment assembly, making the overall structure simpler and easier to use.

[0012] As a preferred embodiment of the utility model, the buffer assembly includes a spring, a connecting column and an abutment plate, the abutment plate is fixed at the lower end of the connecting column, the spring is installed between the abutment plate and the base, and a vertical connecting sleeve is provided at the center of the lower side of the positioning platform, the connecting sleeve is provided on the connecting column and its lower end abuts against the upper end surface of the abutment plate. This scheme is used in the press-fitting processing of the workpiece. When the workpiece is being press-fitted, the pressure device above the workpiece will apply force to the workpiece. If the downward stroke of the pressure plate on the pressure device is too large, the spring in this scheme will be deformed and compressed, and play a buffering role on the workpiece, so as to prevent the positioning platform from being rigidly squeezed and causing damage to the positioning platform and the workpiece.

[0013] As a preferred embodiment of the utility model, a plurality of guide sleeves are evenly distributed on the lower side of the positioning platform, and a guide column is vertically slidably matched in each guide sleeve, and the guide column is fixed on the base. The guide sleeves in this scheme cooperate with the guide column. On the one hand, they can form inner and outer telescopic sleeves, which can play a vertical guiding role for the positioning platform when the spring is compressed, making the buffering process more stable. On the other hand, through the cooperation of a plurality of guide sleeves and guide columns, the lateral displacement of the positioning platform can be limited, the rotation of the positioning platform can be avoided, and the stability of the positioning platform can be ensured.

[0014] As a preferred embodiment of the utility model, the upper side of the positioning platform is provided with length scale lines along the length direction of the adjustment slot. By providing the length scale lines, the axial center distance between the central positioning pin and the movable positioning pin can be more intuitively observed to adjust the position of the movable positioning pin.

[0015] As a preferred embodiment of the utility model, an adjusting knob is fixed to one end of the screw rod passing through the adjusting slot. The adjusting knob is provided in this solution, and the adjusting knob can be held by hand for adjustment when the screw rod is rotated, which makes rotation more convenient.

[0016] As a preferred embodiment of the utility model, the number of the guide sleeves is greater than or equal to three. In this solution, by providing multiple guide sleeves, and the multiple guide sleeves are evenly distributed, the positioning platform can run more smoothly during the buffering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0018] Figure 2 It is a cutaway view of an embodiment of the utility model.

[0019] Reference numerals include:

[0020] Base 1, positioning platform 2, center positioning pin 3, movable positioning pin 4, adjustment slot 5, screw rod 6, adjustment knob 7, slider 8, connecting sleeve 9, connecting column 10, abutment plate 11, spring 12, guide sleeve 13, guide column 14. DETAILED DESCRIPTION

[0021] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0022] In the description of the present application, the terms "top", "bottom", "one end", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present application.

[0023] See also Figure 1 and Figure 2As shown, the present embodiment discloses a workpiece press-fitting positioning tool, comprising a base 1, a positioning platform 2 for positioning the workpiece is provided above the base 1, specifically, the base 1 and the positioning platform 2 are both disc-shaped, a center positioning pin 3 is integrally formed at the center of the upper end surface of the positioning platform 2, a T-shaped adjusting groove 5 is provided on the upper side of the positioning platform 2, the length direction of the adjusting groove 5 is arranged along the radial direction of the center positioning pin 3, a movable positioning pin 4 is slidably connected in the adjusting groove 5, specifically, an adjusting component is provided in the adjusting groove 5, the adjusting component is used to adjust the position of the movable positioning pin 4, the adjusting component comprises a screw rod 6, one end of the screw rod 6 is rotatably connected to one end of the adjusting groove 5 close to the center positioning pin 3, the other end of the screw rod 6 passes through the adjusting groove 5 and is rotatably connected to the adjusting groove 5, the connection between the screw rod 6 and the adjusting groove 5 is connected through a bearing, one end of the screw rod 6 passing through the adjusting groove 5 is bolted with an adjusting knob 7, a slider 8 is threadedly matched on the screw rod 6, the slider 8 is a T-block matched with the adjusting groove 5, and the upper side of the slider 8 is bolted to the movable positioning pin 4.

[0024] When in use, hold the adjusting knob 7 and rotate the screw rod 6, and the screw rod 6 drives the slider 8 to move horizontally along the screw rod 6. Since the slider 8 is fixed to the movable positioning pin 4, the movable positioning pin 4 is driven to move horizontally to adjust the position of the movable positioning pin 4. In order to more intuitively observe the moving distance of the movable positioning pin 4, length scale lines are chiseled on the upper side of the positioning platform 2 along the length direction of the adjusting groove 5 to facilitate the adjustment of the position of the movable positioning pin 4.

[0025] This solution is used in workpiece press-fitting processing. Workpiece press-fitting is a processing process in which an object is fixed to another object by mechanical force or hydraulic pressure. During use, the pressure device above the workpiece will apply force to the workpiece. The pressure device can be a cylinder or a hydraulic press. If the downward stroke of the pressure plate on the pressure device is too large, it may cause rigid extrusion to the positioning platform 2 and thus damage the positioning platform 2 and the workpiece. In this regard, a buffer assembly is provided between the positioning platform 2 and the base 1. Specifically, the buffer assembly includes a spring 12, a connecting column 10 and an abutment plate 11. The abutment plate 11 is fixed at the lower end of the connecting column 10. The spring 12 is installed between the abutment plate 11 and the base 1. A vertical connecting sleeve 9 is integrally formed at the center of the lower side of the positioning platform 2. The connecting sleeve 9 is sleeved on the connecting column 10 and its lower end abuts against the upper end surface of the abutment plate 11.

[0026] During the workpiece press-fitting process, if the downward pressing stroke of the pressure plate on the pressure device is within an appropriate range, the spring 12 remains in the initial state and the workpiece is smoothly press-fitted. If the downward pressing stroke is too large, after the workpiece is press-fitted, the pressure plate continues to press down. At this time, the spring 12 will deform and compress, which will act as a buffer for the workpiece to protect the positioning table 2 and the workpiece from damage.

[0027] A plurality of guide sleeves 13 are integrally formed on the lower side of the positioning table 2. In the present embodiment, three guide sleeves 13 are provided, and the three guide sleeves 13 are evenly distributed around the connecting sleeve 9. A guide column 14 is vertically slidably fitted in each guide sleeve 13. The guide column 14 is bolted to the base 1. Through the cooperation between the guide sleeve 13 and the guide column 14, on the one hand, the guide sleeve 13 and the guide column 14 can form an inner and outer telescopic sleeve, which can vertically guide the positioning table 2 when the spring 12 is compressed, so as to make the buffering process smoother. On the other hand, the cooperation between the guide sleeve 13 and the guide column 14 can limit the lateral displacement of the positioning table 2 and prevent the positioning table 2 from rotating, so as to ensure the stability of the workpiece when it is processed on the positioning table 2.

[0028] Specific implementation process:

[0029] The process of installing the positioning platform 2 on the base 1 is: place the connecting sleeve 9 and the guide sleeve 13 on the lower side of the positioning platform 2 respectively on the top of the connecting column 10 and the guide column 14, and then set them from downward to the corresponding positions. The installation process is simple and convenient, which is convenient for later disassembly, maintenance or replacement.

[0030] The use process of the positioning table 2 is as follows: before the press-fitting process, first obtain the distance between the two axes of the crankshaft seat hole and the bearing slot hole on the workpiece according to the model of the workpiece to be processed, and then use the axis of the center positioning pin 3 as the origin, and adjust the movable positioning pin 4 to the appropriate position by holding the adjustment knob 7, so that the axis distance between the center positioning pin 3 and the movable positioning pin 4 is equal to the distance between the two axes of the crankshaft seat hole and the bearing slot hole. After adjusting the movable positioning pin 4, batch processing of the workpiece can be started. During processing, the crankshaft seat hole and the bearing slot hole on the workpiece are aligned and the center positioning pin 3 and the movable positioning pin 4 are inserted respectively to achieve positioning.

[0031] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A workpiece press-fitting and positioning tool, characterized in that: It includes a base, on which is a positioning platform for positioning a workpiece, a center positioning pin is provided at the center of the upper end surface of the positioning platform, a movable positioning pin is slidably connected to the upper end surface of the positioning platform, an adjustment groove for horizontal sliding of the movable positioning pin is provided on the upper side of the positioning platform, the length direction of the adjustment groove is arranged along the radial direction of the center positioning pin, an adjustment component is provided in the adjustment groove, and the adjustment component is used to adjust the position of the movable positioning pin; a buffer component is provided between the positioning platform and the base.

2. The workpiece press-fitting and positioning tool according to claim 1, characterized in that: The adjustment assembly includes a screw rod, one end of which is rotatably connected to one end of the adjustment slot near the center positioning pin, and the other end of the screw rod passes through the adjustment slot and is rotatably connected to the adjustment slot. A slider that matches the adjustment slot is threadedly connected to the screw rod, and the slider is fixed to the movable positioning pin.

3. The workpiece press-fitting and positioning tool according to claim 1, characterized in that: The buffer assembly includes a spring, a connecting column and an abutment plate, the abutment plate is fixed to the lower end of the connecting column, the spring is installed between the abutment plate and the base, a vertical connecting sleeve is provided at the center of the lower side of the positioning platform, the connecting sleeve is arranged on the connecting column and its lower end abuts against the upper end surface of the abutment plate.

4. The workpiece press-fitting and positioning tool according to claim 3 is characterized in that: A plurality of guide sleeves are evenly distributed on the lower side of the positioning platform, and a guide column is vertically slidably matched in each guide sleeve, and the guide column is fixed on the base.

5. The workpiece press-fitting and positioning tool according to claim 1, characterized in that: The upper side of the positioning platform is provided with length scale lines along the length direction of the adjustment groove.

6. The workpiece press-fitting and positioning tool according to claim 2, characterized in that: An adjusting knob is fixed on one end of the screw rod passing through the adjusting slot.

7. The workpiece press-fitting and positioning tool according to claim 4, characterized in that: The number of the guide sleeves is greater than or equal to three.

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