A quick clamping device for shell and machining method

Abstract

The application provides a shell quick clamping device and processing method, and belongs to the technical field of machining. A transverse positioning pin is arranged at the center of a connecting disc in the device, a strip-shaped hole is arranged at the center of a clamping body, the transverse positioning pin is inserted into the strip-shaped hole and is converted between the limit positions at the two ends of the strip-shaped hole, the processing positions of two nozzles are converted, the clamping of the shell is realized through the cooperation of a supporting block, a fixed plate, an adjusting rod, a supporting block and the like, a counterweight body is arranged on the clamping body, and the gravity center of the adjusting device is coincident with the rotation center of a machine tool. During processing, after the shell is clamped, the clamping body is moved so that the transverse positioning pin is located at the limit position at one end of the strip-shaped hole, the target nozzle is located at the rotation center of the machine tool and is processed, the clamping body is moved again so that the transverse positioning pin is located at the limit position at the other end of the strip-shaped hole, and the processing of the other nozzle is completed. The application does not need to convert the reference or the tooling, and the positioning precision is reliably ensured.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, specifically relating to a quick-clamping device for housings and a machining method. Background Technology

[0002] like Figure 1 The part shown is a housing. The raw material for this part is a forging made of 2D70. The product has a complex external structure. In addition to having complex cavity dimensions, there are many structural elements on its outer surface. The main components include three nozzles located on one side wall, namely nozzle a, nozzle b, and nozzle c. The three nozzles are distributed in a triangle. Nozzle c is located in the middle of the side wall of the housing, while nozzles a and b are close to the edge of the side wall. The three nozzles have an external thread structure, and the center of the thread has a certain dimensional positional relationship with the cavity.

[0003] When machining nozzles a and b of the housing, nozzle c has a strict dimensional relationship with other cavities. Therefore, nozzle c serves as the machining positioning datum for all cavities of the housing and nozzles a and b. That is, before turning nozzles a and b, nozzle c must be rough-machined into a precision cylindrical component in the preceding process. After completing the cavities and nozzles a and b, the cavities are used as the datum (mutually datums) to complete the machining of nozzle c. Therefore, a dedicated fixture needs to be designed to complete the thread machining of nozzles a and b, using the rough-machined cylinder of nozzle c as the datum, to ensure the positional dimensions of the threads. Summary of the Invention

[0004] To address the aforementioned machining problems of nozzles a and b, this invention proposes a quick-clamping device and machining method for the housing. This method can quickly complete the clamping and positioning of the housing, and simultaneously complete the machining conversion of nozzles a and b without changing other positioning devices. It efficiently completes the machining of multiple nozzles on the housing, ensuring machining accuracy while improving machining efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A quick clamping device for a housing, the quick clamping device comprising a clamping body 1, a connecting plate 2, a tapered handle 3, a transverse positioning pin 4, a right support block 5, a positioning plate 6, a right fixing plate 7, a sliding support block 8, a right adjusting rod 9, a left support block 10, a pressing block slide 11, a sliding pressing block 12, a left adjusting rod 13, a left fixing plate 14, and a counterweight 15.

[0007] The clamping body 1 is a steel disc component, serving as the mounting platform for the device. It has a strip-shaped hole at its center, and a rectangular slot on each side of the strip-shaped hole. The three holes are arranged and extend along the same diameter. The strip-shaped hole is used to cooperate with the transverse positioning pin 4 to realize the positioning conversion of the rotation center when processing nozzle a and nozzle b. The two rectangular slots are used to cooperate with the fastening bolts to realize the fastening connection between the clamping body 1 and the connecting plate 2. The clamping body 1 is provided with several bolt holes for the installation and adjustment of the counterweight 15.

[0008] The connecting disc 2 is a steel disc component with a central pin hole for installing a transverse positioning pin 4. Two large bolt holes are provided on both sides of the central pin hole for engaging with rectangular slots on the clamping body 1. The connecting disc 2 and the clamping body 1 are fastened together by fastening bolts. Multiple small bolt holes are evenly arranged along the circumference of the connecting disc 2 for fastening bolts to pass through, thereby achieving a fastening connection between the connecting disc 2 and the cone shank 3.

[0009] The tapered shank 3 is a steel component with a boss at one end and bolt holes on the boss. The boss is used to fix the tapered shank 3 to the connecting plate 2 by engaging with the small bolt holes on the connecting plate 2 with the fastening bolts. The other end of the tapered shank 3 is a tapered surface with an angle that matches the machine tool spindle. It is used to connect to the machine tool equipment. After connection, the tapered shank 3 and the connecting plate 2 are coaxial and coincide with the rotation center of the machine tool.

[0010] One end of the transverse positioning pin 4 is fixedly installed in the center pin hole of the connecting plate 2, so that the transverse positioning pin 4 coincides with the rotation center of the machine tool. The other end of the transverse positioning pin 4 extends into the strip hole on the fixture body 1. By moving the fixture body 1, the transverse positioning pin 4 is switched between the extreme positions at both ends of the strip hole. When the transverse positioning pin 4 is at the two extreme positions of the strip hole, the nozzle a and nozzle b on the clamped housing to be processed coincide with the rotation center of the machine tool, respectively. That is, the processing conversion of nozzle a and nozzle b is realized by the switching of the transverse positioning pin 4 between the two extreme positions of the strip hole.

[0011] The right support block 5 and the left support block 10 are both rectangular block components, with their bottoms fixedly installed on the clamping body 1. They are arranged on both sides of the diameter of the strip hole, and bolt holes are provided at the top of both.

[0012] The positioning plate 6 is fastened by fastening bolts and the bolt holes at the upper end of the right support block 5. After the connection, a rectangular through groove is formed between the two. A protruding strip plate is made on the side wall of the positioning plate 6 near the left support block 10. The strip plate has positioning holes for cooperating with the nozzle c on the shell to be processed to achieve the positioning of the shell to be processed.

[0013] The right fixing plate 7 is fixed to the rectangular through slot formed by the positioning plate 6 and the right support block 5 by fastening bolts, and is located on the side away from the left support block 10, with a threaded hole in the middle; the right adjusting rod 9 is screwed into the threaded hole so that its end extends into the rectangular through slot.

[0014] The sliding support block 8 is slidably installed in the rectangular through groove between the positioning plate 6 and the right support block 5. The end face away from the left support block 10 is provided with a groove. The end of the right adjusting rod 9 is stuck in the groove. The other end of the sliding support block 8 is in contact with the shell to be processed. The sliding support block 8 is slidable by rotating the right adjusting rod 9, thereby adjusting the position of the shell to be processed.

[0015] The clamping block slide 11 is fastened by fastening bolts and bolt holes at the upper end of the left support block 10. After the connection, a rectangular slide groove is formed between the two.

[0016] The left fixing plate 14 is fixed to the rectangular slide groove formed by the pressing block slide 11 and the left support block 10 by fastening bolts, and is located on the side away from the right support block 5, with a threaded hole in the middle; the left adjusting rod 13 is screwed into the threaded hole so that its end extends into the rectangular slide groove.

[0017] The sliding clamping block 12 is slidably installed in the rectangular groove between the clamping block slide 11 and the left support block 10. The end face away from the right support block 5 is provided with a groove. The end of the left adjusting rod 13 is stuck in the groove. The other end of the sliding clamping block 12 abuts against the shell to be processed. The sliding clamping block 12 is slidable by rotating the left adjusting rod 13, thereby adjusting the clamping force.

[0018] The counterweight 15 is an arc-shaped steel component with through holes. It is fixedly installed by fastening bolts that engage with bolt holes on the fixture body 1. During processing, the quick clamping device will experience a shift in its center of gravity. By installing the counterweight 15 at an appropriate position, the center of gravity of the quick clamping device can be adjusted to coincide with the rotation center of the machine tool.

[0019] A shell machining method, implemented based on the quick clamping device, includes the following steps:

[0020] Step 1: Before machining nozzles a and b, rough machine nozzle c to its precise outer diameter for positioning during subsequent machining. Place the housing with the three nozzles facing outwards between the two support blocks on the fixture 1. Insert nozzle c into the positioning hole on the positioning plate 6. The housing to be machined should fit against the lower end face of the positioning hole. Twist the right adjusting rod 9 to push the sliding support block 8 against the end face of the housing to be machined, thus completing the positioning of the housing.

[0021] Step 2: Move the clamp body 1 so that the transverse positioning pin 4 is at the extreme position of one end of the strip hole on the clamp body 1. After passing the fastening bolt through the rectangular slot on the clamp body 1, screw it into the large bolt hole of the connecting plate 2 to fasten the clamp body 1 and the connecting plate 2. At this time, the nozzle a or nozzle b on the housing to be processed coincides with the axis of the connecting plate 2. Fasten the connecting plate 2 and the tapered shank 3 with the fastening bolt.

[0022] Step 3: Twist the left adjusting rod 13 to push the sliding clamping block 12 to clamp the shell to be processed.

[0023] Step 4: Install the taper shank 3 on the machine tool spindle and fasten it to the machine tool spindle by using a pull stud. At this time, the nozzle a or nozzle b coincides with the rotation center of the machine tool. Install the counterweight 15 at an appropriate position on the fixture body 1 to balance the center of gravity of the quick clamping device; turn the nozzle to complete the machining.

[0024] Step 5: Loosen the two fastening bolts of the fastening connecting plate 2 and the clamping body 1, move the clamping body 1 so that the transverse positioning pin 4 is located at the other extreme position of the strip hole on the clamping body 1, and then tighten the connecting plate 2 and the clamping body 1. At this time, the rotation center of the unprocessed nozzle coincides with the rotation center of the machine tool spindle. Adjust the position of the counterweight 15 to balance the center of gravity and complete the turning of the nozzle.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. High machining accuracy: When machining the shell using this device, there is no need to convert the reference or change the tooling. Only the positioning pin needs to be moved to different positions, so the positioning accuracy is reliably guaranteed.

[0027] 2. This device avoids the use of complex assembly fixtures. Although assembly fixtures can also solve the processing of this product, they have a long preparation cycle, are bulky, have poor operability, and are not convenient for mass production of workpieces. Attached Figure Description

[0028] Figure 1 - A schematic diagram of the shell structure, where (a) is the front view and (b) is the side view;

[0029] Figure 2 - Front view of the rapid positioning device;

[0030] Figure 3 -Left view of the rapid positioning device;

[0031] Figure 4 - A 3D view of the rapid positioning device;

[0032] Figure 5 - Schematic diagram of the clamping of the rapid positioning device;

[0033] Figure 6 -Schematic diagram of the clamping body structure;

[0034] In the diagram: 1-Clamping body; 2-Connecting disc; 3-Conical handle; 4-Horizontal positioning pin; 5-Right support block; 6-Positioning plate; 7-Right fixing plate; 8-Sliding support block; 9-Right adjusting rod; 10-Left support block; 11-Clamping block slide; 12-Sliding clamping block; 13-Left adjusting rod; 14-Left fixing plate; 15-Counterweight. Detailed Implementation

[0035] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and technical solutions.

[0036] It should be understood that the accompanying drawings are not drawn to scale, but are merely appropriately simplified depictions to illustrate the various features of the basic principles of the invention. Specific design features of the invention disclosed herein, including, for example, specific dimensions, orientations, positions, and shapes, will be determined in part by the specific application and environment in which they are used. In the accompanying drawings, the same or equivalent parts (elements) are indexed with the same reference numerals.

[0037] A quick-clamping device for a housing, comprising a clamping body 1, a connecting disc 2, a tapered shank 3, a transverse positioning pin 4, a right support block 5, a positioning plate 6, a right fixing plate 7, a sliding support block 8, a right adjusting rod 9, a left support block 10, a pressing block slide 11, a sliding pressing block 12, a left adjusting rod 13, a left fixing plate 14, and a counterweight 15. Figures 2 to 4 As shown.

[0038] like Figure 6 As shown, the clamping body 1 is a steel disc component, serving as the mounting platform for the device. It has a strip-shaped hole at its center, and a rectangular slot on each side of the strip-shaped hole. The three holes are arranged and extend along the same diameter. The strip-shaped hole is used to cooperate with the transverse positioning pin 4 to realize the positioning conversion of the rotation center when processing nozzle a and nozzle b. The two rectangular slots are used to cooperate with the fastening bolts to realize the fastening connection between the clamping body 1 and the connecting disc 2. Near the edge of each end of the diameter where the three holes are located on the clamping body 1, there is a pair of bolt holes. Each pair of bolt holes is symmetrically distributed along the diameter and is used for the installation and adjustment of the counterweight 15.

[0039] The connecting disc 2 is a steel disc component with a central pin hole at its center for installing a transverse positioning pin 4. Two large bolt holes are symmetrically arranged on both sides of the central pin hole, corresponding to the rectangular slots on the clamp body 1, for fastening the two together with bolts. Four small bolt holes are evenly arranged around the central pin hole on the connecting disc 2, for the bolts to pass through, thus achieving a fastening connection between the connecting disc 2 and the cone handle 3.

[0040] The tapered shank 3 is a steel component with a boss at one end and four bolt holes on the boss. The positions of the four bolt holes correspond to the positions of the four small bolts on the connecting plate 2, which are used to fix the two together by tightening the bolts. The other end of the tapered shank 3 is a tapered surface with an angle that matches the machine tool spindle, which is used to connect with the machine tool equipment. After connection, the tapered shank 3 and the connecting plate 2 are coaxial and coincide with the rotation center of the machine tool.

[0041] One end of the transverse positioning pin 4 is fixedly installed in the center pin hole of the connecting plate 2, so that the transverse positioning pin 4 coincides with the rotation center of the machine tool. The other end of the transverse positioning pin 4 extends into the strip hole on the fixture body 1. By moving the fixture body 1, the transverse positioning pin 4 is switched between the extreme positions at both ends of the strip hole. When the transverse positioning pin 4 is at the two extreme positions of the strip hole, the nozzle a and nozzle b on the clamped housing to be processed coincide with the rotation center of the machine tool, respectively. That is, the processing conversion of nozzle a and nozzle b is realized by the switching of the transverse positioning pin 4 between the two extreme positions of the strip hole.

[0042] The right support block 5 and the left support block 10 are both rectangular block components, with their bottoms fixedly installed on the clamping body 1. They are arranged on both sides of the diameter of the strip hole, and each has two bolt holes at its upper end.

[0043] The positioning plate 6 is fastened by fastening bolts and the bolt holes at the upper end of the right support block 5. After the connection, a rectangular through groove is formed between the two. A protruding strip plate is made on the side wall of the positioning plate 6 near the left support block 10. The end of the strip plate is fixed with a positioning hole for cooperating with the nozzle c on the shell to be processed to achieve the positioning of the shell to be processed.

[0044] The right fixing plate 7 covers the rectangular through slot formed by the positioning plate 6 and the right support block 5, and is located on the side away from the left support block 10. It is fixed to the right support block 5 by fastening bolts. The right fixing plate 7 has a threaded hole in the middle. The right adjusting rod 9 is screwed into the threaded hole so that its end extends into the rectangular through slot.

[0045] The sliding support block 8 is slidably installed in the rectangular through groove between the positioning plate 6 and the right support block 5. The end face away from the left support block 10 is provided with a groove. The end of the right adjusting rod 9 is stuck in the groove, so that the sliding support block 8 can slide with the right adjusting rod 9. The other end of the sliding support block 8 contacts the shell to be processed. The sliding support block 8 is slidable by rotating the right adjusting rod 9, thereby adjusting the position of the shell to be processed.

[0046] The clamping block slide 11 is fastened by fastening bolts and bolt holes at the upper end of the left support block 10. After the connection, a rectangular slide groove is formed between the two.

[0047] The left fixing plate 14 covers the rectangular groove formed by the pressing block slide 11 and the left support block 10, and is located on the side away from the right support block 5. It is fixed to the left support block 10 by fastening bolts. The left fixing plate 14 has a threaded hole in the middle. The left adjusting rod 13 is screwed into the threaded hole so that its end extends into the rectangular groove.

[0048] The sliding clamping block 12 is slidably installed in the rectangular groove between the clamping block slide 11 and the left support block 10. The end face away from the right support block 5 is provided with a groove. The end of the left adjusting rod 13 is stuck in the groove, so that the right support block 5 can slide with the left adjusting rod 13. The other end of the sliding clamping block 12 abuts against the shell to be processed. The sliding clamping block 12 is slidable by rotating the left adjusting rod 13, thereby adjusting the clamping force. The sliding clamping block 12 and the sliding support block 8 cooperate to clamp the shell to be processed.

[0049] The counterweight 15 is an arc-shaped steel component with through holes at both ends. According to the center of gravity offset of the quick clamping device during processing, one pair of bolt holes on the fixture body 1 is selected to match the through holes on the counterweight 15. The counterweight 15 is installed on the fixture body 1 by tightening the bolts, and the center of gravity of the quick clamping device is adjusted to coincide with the rotation center of the machine tool.

[0050] Based on the above-mentioned quick clamping device, the shell processing method includes the following steps:

[0051] Step 1: Before machining nozzles a and b, rough machine nozzle c to its precise outer diameter for positioning during subsequent machining. Place the housing with the three nozzles facing outwards between the two support blocks on the fixture 1. Insert nozzle c into the positioning hole on the positioning plate 6. The housing to be machined should fit against the lower end face of the positioning hole. Twist the right adjusting rod 9 to push the sliding support block 8 against the end face of the housing to be machined, thus completing the positioning of the housing.

[0052] Step 2: Move the clamp body 1 so that the transverse positioning pin 4 is at the extreme position of one end of the strip hole on the clamp body 1. After passing the fastening bolt through the rectangular slot on the clamp body 1, screw it into the large bolt hole of the connecting plate 2 to fasten the clamp body 1 and the connecting plate 2. At this time, the nozzle a on the shell to be processed coincides with the axis of the connecting plate 2. Fasten the connecting plate 2 and the tapered shank 3 with the fastening bolt.

[0053] Step 3: Twist the left adjusting rod 13 to push the sliding clamping block 12 to clamp the housing to be processed. Figure 5 As shown.

[0054] Step 4: Install the taper shank 3 on the machine tool spindle and fasten it to the machine tool spindle by using a pull stud. At this time, the nozzle a coincides with the rotation center of the machine tool. Install the counterweight 15 on the bolt hole on the side of the fixture 1 near the nozzle a to balance the center of gravity of the quick clamping device; the nozzle a is turned.

[0055] Step 5: Loosen the two fastening bolts of the fastening connecting plate 2 and the clamping body 1, move the clamping body 1 so that the transverse positioning pin 4 is located at the other extreme position of the strip hole on the clamping body 1, and then tighten the connecting plate 2 and the clamping body 1. At this time, the nozzle b coincides with the rotation center of the machine tool spindle. Install the counterweight 15 to the bolt hole on the other side of the clamping body 1 to balance the center of gravity of the quick clamping device and complete the turning of the nozzle b.

Claims

1. A quick-clamping device for housings, characterized in that, The quick clamping device includes a clamping body (1), a connecting plate (2), a cone handle (3), a transverse positioning pin (4), a right support block (5), a positioning plate (6), a right fixing plate (7), a sliding support block (8), a right adjusting rod (9), a left support block (10), a pressing block slide (11), a sliding pressing block (12), a left adjusting rod (13), and a left fixing plate (14). The clamping body (1) is a disc component with a strip hole at its center and a rectangular slot on each side of the strip hole. The three holes are arranged and extend along the same diameter. The strip hole is used to cooperate with the transverse positioning pin (4) to realize the positioning conversion of the rotation center when processing nozzle a and nozzle b. The two rectangular slots are used to realize the fastening connection between the clamping body (1) and the connecting disc (2). The connecting plate (2) is a disc component with a central pin hole in the center for installing a transverse positioning pin (4). Two large bolt holes are provided on both sides of the central pin hole for cooperating with the rectangular slot on the clamp body (1) to achieve a fast connection. One end of the tapered shank (3) is fixedly connected to the connecting plate (2), and the other end is connected to the machine tool. After connection, the tapered shank (3) and the connecting plate (2) are coaxial and coincide with the rotation center of the machine tool. One end of the transverse positioning pin (4) is fixedly installed in the center pin hole of the connecting plate (2), and the other end of the transverse positioning pin (4) extends into the strip hole on the clamp body (1). By switching the transverse positioning pin (4) between the two extreme positions of the strip hole, the processing conversion of nozzle a and nozzle b is realized. The right support block (5) and the left support block (10) are both rectangular block components, and their bottoms are fixedly installed on the clamping body (1), and they are arranged on both sides of the diameter of the strip hole. The positioning plate (6) is fastened to the upper part of the right support block (5). After the connection, a rectangular through groove is formed between the two. A protruding strip plate is made on the side wall of the positioning plate (6) near the left support block (10). A positioning hole is made on the strip plate to cooperate with the nozzle c on the shell to be processed, so as to realize the positioning of the shell to be processed. The right fixing plate (7) is fixed at the rectangular through slot formed by the positioning plate (6) and the right support block (5), and is located on the side away from the left support block (10), with a threaded hole in the middle; the right adjusting rod (9) is screwed into the threaded hole so that its end extends into the rectangular through slot; The sliding support block (8) is slidably installed in the rectangular through groove between the positioning plate (6) and the right support block (5). The end of the sliding support block (8) away from the left support block (10) is engaged with the right adjusting rod (9). One end of the sliding support block (8) is in contact with the shell to be processed. The sliding support block (8) is slidable by rotating the right adjusting rod (9), thereby adjusting the position of the shell to be processed. The pressing block slide (11) is fastened to the top of the left support block (10), and after the connection, a rectangular slide groove is formed between the two. The left fixing plate (14) is fixed at the rectangular groove formed by the pressing block slide (11) and the left support block (10), and is located on the side away from the right support block (5), with a threaded hole in the middle; the left adjusting rod (13) is screwed into the threaded hole so that its end extends into the rectangular groove; The sliding clamping block (12) is slidably installed in the rectangular groove between the clamping block slide (11) and the left support block (10). The end of the block away from the right support block (5) is engaged with the end of the left adjusting rod (13), and the other end of the sliding clamping block (12) abuts against the shell to be processed. The sliding clamping block (12) is slidable by rotating the left adjusting rod (13), thereby adjusting the clamping force.

2. The quick-clamping device for a housing according to claim 1, characterized in that, The connecting plate (2) is provided with multiple small bolt holes evenly arranged along the circumference, and the end face of the cone shank (3) is provided with bolt holes at corresponding positions. The two are connected by fastening bolts.

3. The quick-clamping device for a housing according to claim 1, characterized in that, The sliding support block (8) has a groove on the end face away from the left support block (10), and the end of the right adjusting rod (9) is stuck in the groove.

4. The quick-clamping device for a housing according to claim 1, characterized in that, The sliding clamping block (12) has a groove on the end face away from the right support block (5), and the end of the left adjusting rod (13) is stuck in the groove.

5. The quick-clamping device for a housing according to claim 1, characterized in that, The clamp body (1), connecting plate (2) and cone handle (3) are steel components.

6. A quick-clamping device for housings according to any one of claims 1-5, characterized in that, The quick clamping device also includes a counterweight (15), which is an arc-shaped steel component. It is installed at an appropriate position on the clamping body (1) to adjust the center of gravity of the quick clamping device to coincide with the rotation center of the machine tool.

7. A method for machining a housing, implemented based on the quick clamping device according to any one of claims 1-5. The shell has three nozzles on one side wall, namely nozzle a, nozzle b, and nozzle c, which are arranged in a triangle. Nozzle c is located in the middle of the side wall of the shell, while nozzles a and b are close to the edge of the side wall. The shell processing method includes the following steps: Step 1: Place the shell to be processed with three nozzles on one side of the rough-machined nozzle c between two support blocks on the clamping body (1). Insert the nozzle c into the positioning hole on the positioning plate (6). The shell to be processed fits the lower end face of the positioning hole. Twist the right adjusting rod (9) to push the sliding support block (8) to fit the end face of the shell to be processed, thus completing the positioning of the shell to be processed. Step 2: Move the clamp body (1) so that the transverse positioning pin (4) is at the extreme position of one end of the strip hole on the clamp body (1), and fasten the clamp body (1) to the connecting plate (2). At this time, the nozzle a or nozzle b on the shell to be processed coincides with the axis of the connecting plate (2); fasten the connecting plate (2) to the tapered shank (3). Step 3: Twist the left adjusting rod (13) to push the sliding clamping block (12) to clamp the shell to be processed; Step 4: Install the taper shank (3) on the machine tool spindle. At this time, nozzle a or nozzle b coincides with the rotation center of the machine tool; the nozzle is then machined. Step 5: Loosen the connecting plate (2) and the clamping body (1), move the clamping body (1) so that the transverse positioning pin (4) is located at the other extreme position of the strip hole on the clamping body (1), and then tighten the connecting plate (2) and the clamping body (1). At this time, the rotation center of the unprocessed nozzle coincides with the rotation center of the machine tool spindle, and the turning of the nozzle is completed.

8. A shell processing method, implemented based on the quick clamping device described in claim 6. The shell has three nozzles on one side wall, namely nozzle a, nozzle b, and nozzle c, which are arranged in a triangle. Nozzle c is located in the middle of the side wall of the shell, while nozzles a and b are close to the edge of the side wall. The shell processing method includes the following steps: Step 1: Place the shell to be processed with three nozzles on one side of the rough-machined nozzle c between two support blocks on the clamping body (1). Insert the nozzle c into the positioning hole on the positioning plate (6). The shell to be processed fits the lower end face of the positioning hole. Twist the right adjusting rod (9) to push the sliding support block (8) to fit the end face of the shell to be processed, thus completing the positioning of the shell to be processed. Step 2: Move the clamp body (1) so that the transverse positioning pin (4) is at the extreme position of one end of the strip hole on the clamp body (1), and fasten the clamp body (1) to the connecting plate (2). At this time, the nozzle a or nozzle b on the shell to be processed coincides with the axis of the connecting plate (2); fasten the connecting plate (2) to the tapered shank (3). Step 3: Twist the left adjusting rod (13) to push the sliding clamping block (12) to clamp the shell to be processed; Step 4: Install the taper shank (3) on the machine tool spindle. At this time, nozzle a or nozzle b coincides with the rotation center of the machine tool. Install a counterweight (15) at an appropriate position on the fixture (1) to balance the center of gravity of the quick clamping device; finish turning the nozzle. Step 5: Loosen the connecting plate (2) and the clamping body (1), move the clamping body (1) so that the transverse positioning pin (4) is located at the other extreme position of the strip hole on the clamping body (1), and then tighten the connecting plate (2) and the clamping body (1). At this time, the rotation center of the unprocessed nozzle coincides with the rotation center of the machine tool spindle. Adjust the position of the counterweight (15) to balance the center of gravity and complete the turning of the nozzle.

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