Multi-procedure grouped quick-change device for machining rocker arm type parts and machining method of multi-procedure grouped quick-change device for machining rocker arm type parts

Abstract

The invention belongs to the field of design of tools for machining, and relates to a multi-procedure grouped quick change device for machining rocker arm parts and a machining method. Comprising a first rough machining module, a second rough machining module, a first finish machining module and a second finish machining module which are arranged on a quick-change bottom plate. By means of the quick remodeling method, the product remodeling time is effectively shortened, machining of various rocker arm type parts can be met only by simply adjusting and replacing local modules or replacing a quick-changing bottom plate, multi-procedure quick clamping of one rocker arm type part is met, quick remodeling of various rocker arm type parts can be achieved, and the machining efficiency is improved. The problem that the field is difficult to manage due to the fact that the number of clamps or devices is large due to the fact that the types of the parts are large is solved, and the machining cost is greatly reduced.

Description

Technical Field

[0001] The invention belongs to the field of tooling design for machining, and relates to a multi-process group quick-change device and a machining method for machining rocker arm parts. Background Art

[0002] Rocker arm is a common mechanical part, mostly thin-walled and special-shaped frame structure. In the processing process, there are often problems such as difficult to ensure processing accuracy, difficult to select positioning reference, and difficult to arrange CNC tool path. When processing rocker arm parts with traditional technology, it is usually necessary to customize multiple sets of fixtures, which can only be completed after the turnover of multiple equipment. The processing quality is poor, the cost is high, and the production cycle is long. With the upgrade of CNC equipment, in order to solve the problems of large number of fixtures, cumbersome replacement of fixtures, and long production cycle, for production needs, it is necessary to design a group of quick-change fixtures through the idea of ​​rapid changeover grouping technology to try to solve related technical problems. When machining rocker arm parts, vises and multiple sets of fixtures are generally required for positioning. The vises are clamped for rough processing. According to the status of the parts in different processes, the corresponding fixtures are selected for clamping for further processing. The processing is completed by clamping on the machine tool repeatedly. With the increase in production demand and the diversification of rocker arm parts, the use of traditional fixtures for processing at this time will lead to a cumbersome number of fixtures, increase the difficulty of workers' operation, and the clamping time is too long. The processing efficiency is difficult to meet the existing production needs. Summary of the invention

[0003] Purpose of the Invention

[0004] In order to solve the related technical problems mentioned in the background technology, the present invention proposes a multi-process group quick-change device and processing method for processing rocker arm parts. Through the method of rapid mold change, the product mold change time is effectively shortened, and the processing of various rocker arm parts can be met by simply adjusting, replacing local modules or replacing quick-change base plates. The parts to be processed are rocker arm parts. By designing a quick-change base plate, the part clamping structure is modularized and arranged in an orderly manner on the quick-change base plate, so that multi-process rapid clamping of rocker arm parts can be achieved.

[0005] Technical Solution

[0006] A multi-process group quick-changing device for processing rocker arm parts, comprising a first rough processing module, a second rough processing module, a first fine processing module, and a second fine processing module respectively arranged on a quick-changing base plate 1; the first rough processing module is provided with a symmetrical boss for positioning the blank, and a threaded bushing 4 passes through the boss on one side and is fastened by a screw 3, a first push rod assembly 10 comprises a push plate 12 and a push rod 13, the push rod 13 passes through the threaded bushing 4, and the top plate 12 and the push rod 13 are threadedly matched and tightened, and when clamped, the push rod 13 is rotated to drive the top plate 12 to move axially along the threaded bushing 4 until it fits with the surface of the blank, thereby clamping and fixing the blank; the second rough processing module has the same structure as the first rough processing module, and the boss on the side close to the central axis of the quick-changing base plate 1 is an L-shaped structure, the outer surface of the L-shaped structure is adapted to the outer surface of the blank, and the height of the L-shaped structure is less than the outer surface of the blank. Height, the surface roughness of the L-shaped structure in contact with the blank is not greater than Ra1.6; the first finishing module processes the outer surface of the part, and the first finishing module includes a quick-change base assembly A and a second push rod assembly 19; the quick-change base assembly A is fixed to the quick-change base plate 1 by a hexagonal cylindrical head screw 6, and is positioned by a fixed locating pin 7, the quick-change base assembly A8 and the second push rod assembly 19 jointly realize the positioning and clamping of the part, and the quick-change base assembly A8 is provided with a circular locating pin 14 and a diamond locating pin 15, which are used to position the part with a locating hole; the second finishing module is a quick-change base assembly B9, and the quick-change base assembly B9 includes a pressure plate 17 and a quick-change base 18; the quick-change base 18 is fixed to the quick-change base plate 1 by a hexagonal cylindrical head screw 6, and is positioned by a fixed locating pin 7, the pressure plate 17 presses the part on the quick-change base 18, and is fixed by nuts and bolts.

[0007] Furthermore, the working end surface of the second push rod assembly 19 is adapted to the profiled surface of the part, so that it can be better abutted against the profiled surface of the part, thereby ensuring stability during the processing.

[0008] Furthermore, one end of the fixed positioning pin 7 is interference fit with the quick-change base assembly A8, and the other end is clearance fit with the quick-change base plate 1, thereby achieving rapid positioning of the quick-change base assembly A8 and the quick-change base plate 1 during the change of type.

[0009] Furthermore, one end of the fixed positioning pin 7 is interference fit with the quick-change base assembly B9, and the other end is clearance fit with the quick-change base plate 1, thereby achieving rapid positioning of the quick-change base assembly B9 and the quick-change base plate 1 during the change of model.

[0010] Furthermore, the circular positioning pin 14 and the diamond positioning pin 15 are step structures, and the upper end surface is threaded. The nut is connected to the circular positioning pin 14 or the diamond positioning pin 15 through a thread, and the parts are pressed along the axis direction of the circular positioning pin 14 and the diamond positioning pin 15 to achieve simultaneous clamping and positioning of the parts. The lower end surface is a smooth cylindrical surface, and the side of the smooth cylindrical surface close to the quick-change base plate 1 is connected to the quick-change base plate 1 by an interference fit.

[0011] Furthermore, the sizes of the first rough machining module, the second rough machining module, the first fine machining module, and the second fine machining module are determined according to part specifications.

[0012] Furthermore, it also includes lifting bolts 5, which are arranged around the quick-change base plate 1 and are used for lifting and hanging.

[0013] Furthermore, it also includes a quick-change base plate positioning pin 2, the quick-change base plate 1 and the quick-change base plate positioning pin 2 are interference-fitted, and rapid positioning is achieved through the two base plate positioning pins 2 and the machine tool base plate.

[0014] Furthermore, a plurality of square grooves are provided at the bottom of the quick-change base plate 1 to ensure the flatness requirement of the base plate.

[0015] A multi-process group quick-change processing method for processing rocker arm parts comprises the following steps:

[0016] Step 1, place the part blank in the middle of the symmetrical boss used for positioning in the first rough machining module, and drive the top plate 12 to move axially along the threaded bushing 4 by rotating the top rod 13 until it fits with the surface of the blank, thereby clamping and fixing the blank and completing the machining of the reference surface of the part blank.

[0017] Step 2, take out the part blank with the processed reference surface and place it in the second rough processing module, the processed reference surface of the part is fitted with the L-shaped boss to complete the positioning, and the first push rod assembly 10 is screwed until the part is tightened to achieve the clamping and positioning of the part in this process, completing the rough processing of the part shape and hole position.

[0018] Step 3, after the rough machining of the part is completed, the first finishing module is placed. Since the entire shape of the part is the surface to be machined, the shape cannot be used for positioning or clamping. This method passes the circular locating pin 14 and the diamond locating pin 15 of the quick-change base assembly A through the machined hole of the part, and rotates the shoulder nut 16 to press the part along the thread axis direction of the upper end surface of the circular locating pin 14 and the diamond locating pin 15 to complete the positioning and clamping of the part in this process, thereby ensuring the machining accuracy of the part and completing the finishing shape size.

[0019] Step 4. At this time, all the outer dimensions of the part have been processed. Place it in the second finishing module and complete the positioning through the quick-change base assembly B quick-change base 18. Tighten the nut so that the pressure plate 17 presses the part on the quick-change base 18 to complete the finishing of the hole. At this point, the part processing is completed.

[0020] Furthermore, when the processed part does not need to be processed with a hole, the second push rod assembly 19 in the first finishing module needs to be used for clamping and positioning in step 3. Furthermore, the quick-change base plate 1 is provided with U-shaped grooves around it for fixing the fixture on the machine tool.

[0021] The beneficial effects of this application are:

[0022] In the processing of rocker arm parts, traditional processing methods often have problems such as difficulty in ensuring processing accuracy, difficulty in selecting positioning references, and difficulty in arranging CNC tool paths. It is usually necessary to customize multiple sets of fixtures and complete the process through the turnover of multiple equipment. The processing quality is poor, the cost is high, and the production cycle is long. A multi-process group quick-change device and processing method for processing rocker arm parts effectively shortens the product changeover time through a quick changeover method. It can meet the processing of various rocker arm parts by simply adjusting, replacing local modules or replacing quick-change base plates. It not only meets the multi-process rapid clamping of a rocker arm part, but also realizes the rapid changeover of various rocker arm parts. It solves the problem of difficult on-site management caused by the large number of fixtures or equipment due to the large number of parts, and greatly reduces the processing cost. Through the application of a multi-process group quick-change device and processing method for processing rocker arm parts in the production site, the entire machining process of rocker arm parts becomes more lean and modular. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a multi-process group quick-change device and a processing method for processing rocker arm parts of the present invention.

[0024] Figure 2 yes Figure 1 Top view of the .

[0025] Figure 3 yes Figure 1 Right view of .

[0026] Figure 4 It is a stereoscopic diagram of a multi-process group quick-change device and a processing method for processing rocker arm parts of the present invention.

[0027] Figure 5 It is a structural diagram of the ejector assembly.

[0028] Figure 6 This is the structural diagram of the quick-change base assembly A.

[0029] Figure 7This is the structural diagram of the quick-change base assembly B.

[0030] In the figure, 1-quick change base plate, 2-quick change base plate locating pin, 3-screw, 4-threaded bushing, 5-lifting bolt, 6-hexagon socket head screw, 7-fixed locating pin, 8-quick change base assembly A, 9-quick change base assembly B, 10-first push rod assembly, 11-rocker arm parts, 12-top plate, 13-top rod, 14-round locating pin, 15-diamond locating pin, 16-shoulder nut, 17-pressure plate, 18-quick change base, 19-second push rod assembly 19. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0032] A multi-process group quick-change device and a processing method for processing rocker arm parts, comprising a quick-change base plate, a quick-change base plate positioning pin, a quick-change base assembly A, a quick-change base assembly B, screws, lifting bolts, a fixed positioning pin, a push rod assembly I, a hexagon socket head screw, and a threaded bushing, characterized in that:

[0033] 1. The quick-change base plate is surrounded by U-shaped grooves for fixing the fixture on the machine tool. The bottom is interference-fitted with the quick-change base plate locating pins, and rapid positioning is achieved with the machine tool base plate through two base plate locating pins. A plurality of square grooves are provided at the bottom to ensure the flatness requirements of the base plate. A boss is provided at one end of the base plate plane for installing a threaded bushing. After the threaded bushing is pressed into the boss, screw holes are drilled at both ends for fastening to prevent the bushing from loosening and affecting the positioning accuracy when the push rod assembly is in action. The boss at the other end is used for close contact during rough processing, and a quick-change base assembly positioning and mounting hole is provided at the other end to achieve rapid installation and change of the clamping mechanism of each process of the parts. The end face of the quick-change base plate is the front face with high smoothness, which is used for rapid alignment after the fixture is installed.

[0034] 2. The quick-change base plate positioning pin is a stepped shaft structure, one end of which is interference fit with the quick-change base plate, the step surface is tightly attached, and the other end is positioned with the T-slot of the machine tool;

[0035] 3. The quick-change base assembly is composed of a quick-change base, a round locating pin, a double-headed screw, a nut, a pressure plate, a diamond locating pin, a washer, and a screw. It is connected to the quick-change base plate through fixed locating pins and screws. The quick-change base assembly can be designed according to the specific structure of the rocker arm parts, and the corresponding round locating pins and diamond locating pins are adapted according to the hole size and position relationship of the rocker arm parts to achieve rapid positioning of the corresponding process parts, and rapid clamping is achieved through nuts or pressure plates. The number of quick-change base assemblies is adapted according to the process of the parts to be processed;

[0036] 4. The cylindrical positioning pin and diamond positioning pin are stepped shaft structures, with a threaded part at the upper end, which can be used to press the parts with the nut, and the clearance between the middle and the part hole is used for positioning, and the lower end is interference fit with the quick-change base, close to the end face, and the lower end face is drilled and fastened with the quick-change base to prevent the positioning pin from rotating and reduce positioning errors;

[0037] 5. The lower end of the fixed positioning pin is fixed to the quick-change base plate, and the other end is clearance-matched with the quick-change base assembly to achieve rapid positioning;

[0038] 6. The ejector assembly consists of an ejector and an ejector plate, which is connected to the quick-change bottom plate through a threaded bushing. The ejector is screwed to push the ejector plate to press the parts to be processed. The front end of the ejector is screwed into the ejector plate through a thread, so that the ejector plate can swing freely at the polished rod part of the ejector. Evenly distributed φ4-deep 0.5mm round holes are provided on the working surface of the ejector plate to increase friction and prevent slipping during the process of pressing the parts to be processed.

[0039] 7. The ejector assembly is installed with the boss on the quick-change base plate to replace the vise to achieve quick clamping of parts to complete rough machining;

[0040] A multi-process group quick-change device and processing method for processing rocker arm parts, wherein the fixture parts include (1) a quick-change base plate, (2) a quick-change base plate locating pin, (3) a screw, (4) a threaded bushing, (5) a lifting bolt, (6) a hexagon socket head screw, (7) a fixed locating pin, (8) a quick-change base assembly A, (9) a quick-change base assembly B, (10) a push rod assembly, (11) rocker arm parts, (12) a push plate, (13) a push rod, (14) a round locating pin, (15) a diamond locating pin, (16) a nut, and (17) a pressure plate. Press (4) threaded bushing into (1) quick-change base plate and fix it with (3) screws. Screw (10) push rod assembly into (4) threaded bushing and fix it on (1) quick-change top plate. Position (8) quick-change base assembly A and (9) quick-change base assembly B through (7) fixed positioning pins on (1) quick-change base plate and tighten them with (6) hexagon socket head screws. The fixture is quickly installed on the machine tool base plate through (2) quick-change base plate positioning pins. The rocker arm parts are clamped and positioned in each process state through (10) push rod assembly, (8) quick-change base assembly A, and (9) quick-change base assembly B to perform corresponding process parts processing.

[0041] Application Examples

[0042] The following is an example. Take (11) rocker arm parts (in rough state). After the fixture is assembled, first install the fixture to the machine tool base plate through the (2) quick-change base plate positioning pin. Align the fixture by finding the front face. Put the (11) rocker arm parts rough material into the (1) quick-change base plate on the left side close to the boss. Turn (13) the push rod to push the (12) top plate to complete the clamping. Then start the first step of rough machining to mill out the machining reference surface. Put the processed (11) rocker arm parts into the middle boss of (1) quick-change base plate close to it. Turn the middle (13) push rod to push the (12) top plate to contact (11). The rocker arm parts are clamped until they are against the ground, and the second step of milling the shape is completed. According to the hole position after processing, the (14) circular positioning pin and (15) diamond positioning pin on the plane of the (8) quick-change base assembly A (18) quick-change base are passed through. Then, the (16) nut is tightened to press the upper end face of the part to complete the positioning and clamping of the part to complete the processing of the process. Finally, the part is placed in the quick-change base assembly B and positioned according to the (14) circular positioning pin and (15) diamond positioning pin. The (17) pressure plate is rotated to the appropriate position and the nut is tightened to complete the (11) rocker arm parts processing.

[0043] In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application shall be the common meanings understood by the general technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate the relative direction or positional relationship, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation on this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words "one", "one" or "the" used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The similar words "including" or "comprising" used in the description of this application mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0044] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0045] The above description is only a specific implementation mode of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc. made should be included in the protection scope of the present invention.

Claims

1. A multi-process group quick-change device for processing rocker arm parts, characterized in that: It includes a first rough machining module, a second rough machining module, a first fine machining module, and a second fine machining module, which are respectively arranged on the quick-change base plate; the first rough machining module is provided with a symmetrical boss for positioning the blank, and the threaded bushing passes through the boss on one side and is fastened by a screw, the first push rod assembly includes a push plate and a push rod, the push rod passes through the threaded bushing, and the top plate and the push rod thread are tightened together, and when clamped, the push rod is rotated to drive the top plate to move axially along the threaded bushing until it fits with the surface of the blank, so as to achieve clamping and fixing of the blank; the second rough machining module has the same structure as the first rough machining module, and the boss on the side close to the central axis of the quick-change base plate is an L-shaped structure, the outer surface of the L-shaped structure is adapted to the outer surface of the blank, and the height of the L-shaped structure Smaller than the height of the blank; the first finishing module processes the outer surface of the part, the first finishing module includes a quick-change base assembly A and a second push rod assembly; the quick-change base assembly A is fixed to the quick-change base plate by a hexagonal cylindrical head screw, and is positioned by a fixed locating pin, the quick-change base assembly A and the second push rod assembly jointly realize the positioning and clamping of the part, the quick-change base assembly A is provided with a circular locating pin and a diamond locating pin, which are used to position the part with a locating hole; the second finishing module is a quick-change base assembly B, the quick-change base assembly B includes a pressure plate and a quick-change base; the quick-change base is fixed to the quick-change base plate by a hexagonal cylindrical head screw, and is positioned by a fixed locating pin, the pressure plate presses the part on the quick-change base, and is fixed with nuts and bolts.

2. The quick-change device according to claim 1, characterized in that: The working end surface of the second push rod assembly is adapted to the special-shaped surface of the part.

3. The quick-change device according to claim 2, characterized in that: One end of the fixed positioning pin 7 is interference fit with the quick-change base assembly A, and the other end is clearance fit with the quick-change base plate 1, so as to realize rapid positioning of the quick-change base assembly A and the quick-change base plate 1 during the change of the model.

4. The quick-change device according to claim 3, characterized in that: One end of the fixed positioning pin 7 is interference fit with the quick-change base assembly B, and the other end is clearance fit with the quick-change bottom plate, thereby achieving rapid positioning of the quick-change base assembly B and the quick-change bottom plate during the change of type.

5. The quick-change device according to claim 4, characterized in that: The circular locating pin and the diamond locating pin are step structures, and the upper end surface is threaded. The nut is connected to the circular locating pin or the diamond locating pin by a thread, and the parts are pressed along the axial direction of the circular locating pin and the diamond locating pin to achieve simultaneous clamping and positioning of the parts; the lower end surface is a smooth cylindrical surface, and the smooth cylindrical surface is connected to the quick-change base plate by an interference fit on the side close to the quick-change base plate.

6. The quick-change device according to claim 5, characterized in that: The sizes of the first rough machining module, the second rough machining module, the first fine machining module, and the second fine machining module are determined according to the specifications of the parts; the surface roughness of the L-shaped structure in contact with the blank is not greater than Ra1.

6.

7. The quick-change device according to claim 6, characterized in that: It also includes lifting bolts, which are arranged around the quick-change base plate and are used for lifting and hanging; it also includes quick-change base plate locating pins, the quick-change base plate and the quick-change base plate locating pins are interference fit, and rapid positioning is achieved through the two base plate locating pins and the machine tool base plate.

8. The quick-change device according to claim 7, characterized in that: A number of square grooves are provided at the bottom of the quick-change base plate to ensure the flatness requirements of the base plate.

9. A multi-process group quick-change processing method for processing rocker arm parts using the device as claimed in claim 8, characterized in that: The steps include: Step 1, place the part blank in the middle of the symmetrical boss used for positioning of the first rough machining module, and drive the top plate to move axially along the threaded bushing by rotating the top rod until it fits with the surface of the blank, so as to clamp and fix the blank and complete the machining of the reference surface of the part blank; Step 2, take out the part blank with the processed reference surface and place it in the second rough processing module, the processed reference surface of the part is fitted with the L-shaped boss to complete the positioning, and the first push rod assembly is screwed until the part is tightened to achieve the clamping and positioning of the part in this process, and the rough processing of the part shape and hole position is completed; Step 3: After the rough machining of the part is completed, the first finishing module is placed. Since the entire shape of the part is the surface to be machined, it is impossible to use the shape for positioning or clamping. This method passes the circular locating pin and the diamond locating pin of the quick-change base assembly A through the machined hole of the part, and rotates the shoulder nut along the direction of the thread axis of the upper end surface of the circular locating pin and the diamond locating pin to press the part, completing the positioning and clamping of the part in this process, thereby ensuring the machining accuracy of the part and completing the finishing shape size; Step 4: At this time, all the outer dimensions of the part have been processed. Place it in the second finishing module and position it through the quick-change base assembly B. Tighten the nut so that the pressure plate presses the part against the quick-change base to complete the finishing of the hole. At this point, the part processing is completed.

10. The method according to claim 9, characterized in that When the processed parts do not need to be processed with holes, the second push rod assembly in the first finishing module needs to be used for clamping and positioning in step 3; U-shaped grooves are distributed around the quick-change base plate for fixing the fixture on the machine tool.

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