A kind of semi-automatic processing equipment for crankshaft

Abstract

The invention discloses a crankshaft semi-automatic processing equipment, which belongs to the technical field of crankshaft processing equipment, and includes a frame, a clamping assembly and a processing assembly. The processing assemblies are respectively installed at both ends of the machine tool, and the clamping assembly is installed between the two processing assemblies. The lower end of the upper clamping plate and the upper end of the lower clamping plate are respectively provided with V-shaped clamping grooves, and the V-shaped clamping grooves of the upper clamping plate and the lower clamping plate are arranged correspondingly. The lower clamping plate is fixedly connected to the connecting frame, and the upper clamping plate and the connecting frame are slidably matched; the upper end wall of the connecting frame is respectively provided with rotating through holes, and the lower end of the rotating through hole at the outer end is provided with a second lead screw nut, and the two rotating through holes are respectively rotatably matched with the rotating sleeve, and the two rotating sleeves are connected through a transmission mechanism, and the rotating sleeve is provided with a through hole, and the hole wall of the rotating sleeve is provided with a second guide block distributed along the axis. Compared with the prior art, it has the characteristics of improving processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of crankshaft processing equipment, in particular to a crankshaft semi-automatic processing equipment. Background Art

[0002] In the existing technology, the processing of the center hole and end face of the crankshaft rod is often a complex and delicate task, which usually requires the close cooperation of the milling mechanism and the drilling mechanism to complete. Specific processing steps: First, use the clamping mechanism of the machine tool to clamp the two ends of the crankshaft rod to ensure its stability and accuracy during the processing. Then, use the milling cutter to perform a detailed milling operation on the end face of the crankshaft to achieve the required flatness and finish. Next, use the drill bit of the drilling mechanism to accurately drill the center hole of the crankshaft.

[0003] However, existing machine tools face a significant challenge when drilling crankshafts of different sizes. Since the position and diameter of the crankshaft's main journal vary depending on the crankshaft specifications, it is necessary to ensure that the drill bit and the crankshaft's main journal are strictly on the same axis before drilling. This requirement is crucial to ensuring machining accuracy and the overall performance of the crankshaft.

[0004] Unfortunately, whenever a crankshaft of a certain size needs to be replaced, existing machine tools often require the drill and crankshaft to be repositioned. This process is not only cumbersome and complex, requiring a lot of time and effort, but is also prone to human error, thus affecting machining accuracy and work efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a crankshaft semi-automatic processing equipment to improve the processing efficiency in view of the above deficiencies in the prior art.

[0006] The present invention provides a semi-automatic crankshaft processing equipment, comprising a frame, a clamping assembly and a processing assembly, wherein the processing assemblies are respectively installed at both ends of the frame, and the clamping assembly is installed between the two processing assemblies; the clamping assembly comprises a clamping mechanism, the clamping mechanism comprises a second slide plate, a connecting frame, an upper clamping plate, a lower clamping plate, a second lead screw and a third lead screw, the lower end of the upper clamping plate and the upper end of the lower clamping plate are respectively provided with a V-shaped clamping groove, the V-shaped clamping grooves of the upper clamping plate and the lower clamping plate are arranged correspondingly, the lower clamping plate is fixedly connected to the connecting frame, and the upper clamping plate and the connecting frame are slidably matched; the two ends of the upper end wall of the connecting frame are respectively provided with rotating through holes, and the lower end of the rotating through hole at the outer end is provided with a second lead screw nut, the two rotating through holes are respectively rotatably matched with the rotating sleeve, the two rotating sleeves are connected by a transmission mechanism, the rotating sleeve is provided with a through hole, and the hole wall of the rotating sleeve is provided with a second lead screw nut distributed along the axial center line The guide block; the upper clamping plate is rotatably connected with the second screw, the second screw passes through the threaded through hole of the second screw nut and the rotating sleeve in sequence, the second screw cooperates with the second screw nut, and the outer wall of the second screw is provided with a sliding groove distributed along the axis; the second slide plate is slidably matched with the connecting frame, the second slide plate is provided with a sliding groove, the third screw is installed in the sliding groove of the second slide plate, and the outer wall of the upper end part of the third screw is provided with a sliding groove distributed along the axis, and the sliding grooves of the second screw and the third screw are respectively slidably matched with the corresponding second guide block; the connecting frame is connected to the first sliding block, the first sliding block is slidably matched with the sliding groove of the second slide plate, the first sliding block is provided with a threaded through hole, and the third screw is threadedly matched with the threaded through hole of the first sliding block; the thread rotation directions of the second screw and the third screw are opposite, and the thread lead of the second screw is twice the thread lead of the third screw.

[0007] Furthermore, a first slide plate is fixedly mounted on the upper end of the frame, and the clamping mechanism is slidably matched with the first slide plate.

[0008] Furthermore, three clamping mechanisms are installed on the first slide plate in sequence, and three slide grooves are provided on the first slide plate. A first guide rod is fixedly installed inside the middle slide groove of the first slide plate, and a first bidirectional lead screw and a first lead screw are respectively installed in the other two slide grooves of the first slide plate; the back of the clamping mechanism is respectively fixedly connected to the first lead screw nut and the first guide block, and a guide through hole is provided on the first guide block, and the first guide rod passes through the guide through hole on the first guide block, and the two are slidably matched, and the first lead screw nuts of the clamping mechanisms at both ends of the first slide plate are respectively matched with the threads at the corresponding ends of the first bidirectional lead screw, and the first lead screw nut of the clamping mechanism at the middle position of the first slide plate is matched with the first lead screw.

[0009] Furthermore, symmetrically arranged rectangular guide grooves are respectively provided on the two groove walls of the V-shaped grooves of the upper clamping plate and the lower clamping plate of the two clamping mechanisms, and a clamping block is installed in the rectangular guide groove, and the clamping block slides in cooperation with the rectangular guide groove. A placement groove is provided at the lower ends of the upper clamping plate and the lower clamping plate, and the placement groove is connected to the two rectangular guide grooves through a guide through hole. A blind hole is provided on the inner end wall of the clamping block, and one end of the second guide rod is inserted into the blind hole of the clamping block and connected to the end wall of the blind hole of the clamping block by a spring, and the other end of the second guide rod passes through the guide through hole and is connected to the connecting plate, and a second bidirectional lead screw is installed in the placement groove, and one end of the second bidirectional lead screw is rotatably cooperated with the end wall of the placement groove, and two guide plates are symmetrically installed in the placement groove, one end of the guide plate is provided with an inclined surface, and the other end is provided with a threaded through hole, and the two sections of the thread of the second bidirectional lead screw respectively cooperate with the corresponding threaded through holes of the guide plate, and the inclined surface of the guide plate contacts the connecting plate.

[0010] Furthermore, the processing assembly includes a sliding frame, a milling mechanism and a drilling mechanism. A long strip opening is provided on the upper end surface of the frame. Fixed frames are fixedly installed at both ends of the frame. The fixed frame and the sliding frame are slidably matched. The milling mechanism and the drilling mechanism are installed on the sliding frame. The milling mechanism is installed above the drilling mechanism.

[0011] Furthermore, slideways are provided on both side walls of the fixed frame, a fourth lead screw is installed in one slideway, a third guide rod is installed in the other slideway, a third lead screw nut is fixedly installed on one side of the sliding frame, a third guide block is fixedly installed on the other side, a guide through hole is provided on the third guide block, one end of the fourth lead screw is rotatably matched with the fixed frame, and the other end is connected to the driving mechanism, the fourth lead screw is matched with the third lead screw nut, the third guide rod passes through the guide through hole of the third guide block, and the two are slidably matched.

[0012] Furthermore, the milling mechanism includes a motor and a milling cutter, and the motor shaft of the motor is connected to the milling cutter through a chuck.

[0013] Furthermore, the drilling mechanism includes a motor and a drill bit, and the motor shaft of the motor is connected to the drill bit through a drill chuck.

[0014] Furthermore, the lower ends of the motors of the milling mechanism and the drilling mechanism are respectively fixedly installed with a base, and two second slide plates are fixedly installed on the sliding frame, and the milling mechanism and the drilling mechanism are respectively slidingly matched with the corresponding second slide plates; an intermediate slide is provided in the middle position of the second slide plate, and a fifth lead screw is installed in the intermediate slide, one end of the fifth lead screw is rotatably matched with the second slide plate, and the other end is connected to the driving mechanism, and a second slider is fixedly installed at the lower end of the base, and a threaded through hole is provided on the second slider, and the fifth lead screw cooperates with the threaded through hole of the second slider.

[0015] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0016] 1. When the drilling mechanism of the present invention is in the initial position, the axis center line of the drill bit coincides with the center point of the clamping groove formed by the two V-grooves of the upper clamping plate and the lower clamping plate. When the two V-grooves of the upper clamping plate and the lower clamping plate clamp the main journal of the crankshaft, the center point of the clamping groove formed by the two V-grooves coincides with the center point of the circle of the main journal of the crankshaft. When the upper clamping plate moves in the up and down directions, the connecting frame can move half the distance in the opposite direction, so that the center point position of the clamping groove formed by the two V-grooves remains unchanged. Therefore, when using the clamping assembly to clamp crankshafts of different specifications and sizes, there is no need to adjust the drilling mechanism and the clamping assembly, so that the axis center line of the drill bit coincides with the axis center line of the main journal of the crankshaft, thereby improving the processing efficiency;

[0017] 2. After the crankshaft is forged, the sizes of its multiple main journals may be different. When using multiple clamping mechanisms to clamp different main journals, it is necessary to fine-tune the clamping mechanisms so that their axis lines coincide with the axis lines of the drill bits. In the present invention, symmetrically arranged rectangular guide grooves are provided on the two groove walls of the V-shaped grooves of the upper clamping plates and the lower clamping plates of two of the clamping mechanisms, respectively. Clamping blocks are installed in the rectangular guide grooves, and the clamping blocks are slidably matched with the rectangular guide grooves. When the sizes of the multiple main journals of the crankshaft are different, the crankshaft can be positioned and clamped by means of floating clamping blocks. After the clamping blocks have completed the positioning and clamping of the main journals of the crankshaft, the second bidirectional lead screw can be rotated to drive the guide plate to move, and the guide plate squeezes the spring, thereby locking the clamping blocks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a front view of the present invention;

[0020] Figure 3 It is a rear view of the present invention.

[0021] Figure 4 It is a structural schematic diagram of the clamping mechanism part of the present invention;

[0022] Figure 5 It is a schematic diagram of the internal structure of the clamping mechanism part of the present invention;

[0023] Figure 6 yes Figure 5 A partial enlarged view of part A;

[0024] Among them, 1, frame; 2, clamping assembly; 21, first slide plate; 22, clamping mechanism; 221, second slide plate; 222, connecting frame; 223, upper clamping plate; 224, second lead screw; 225, lower clamping plate; 226, clamping block; 227, second guide rod; 228, connecting plate; 229, guide plate; 230, second bidirectional lead screw; 231, second lead screw nut; 232, rotating sleeve; 233, second guide block; 2 34. The third lead screw; 235. The first slider; 23. The first lead screw; 24. The first guide rod; 25. The first bidirectional lead screw; 26. The first lead screw nut; 27. The first guide block; 3. The machining assembly; 31. The fixed frame; 32. The milling mechanism; 321. The milling cutter; 33. The drilling mechanism; 331. The drill bit; 34. The third guide block; 35. The third guide rod; 36. The third lead screw nut; 37. The fourth lead screw; 38. The sliding frame. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0026] like Figure 1 As shown, the present invention includes a frame 1, a clamping assembly 2 and a processing assembly 3.

[0027] Processing assemblies 3 are respectively installed at both ends of the frame 1, and a clamping assembly 2 is installed between the two processing assemblies 3.

[0028] like Figure 2 and Figure 3 As shown, the clamping assembly 2 includes a clamping mechanism 22 and a first slide plate 21 . The first slide plate 21 is fixedly mounted on the upper end of the frame 1 , and the clamping mechanism 22 is slidably matched with the first slide plate 21 .

[0029] In this embodiment, three clamping mechanisms 22 are installed in sequence on the first slide plate 21, three slide grooves are provided on the first slide plate 21, a first guide rod 24 is fixedly installed inside the middle slide groove of the first slide plate 21, and a first bidirectional screw 25 and a first screw 23 are respectively installed in the other two slide grooves of the first slide plate 21.

[0030] like Figure 4~Figure 6As shown, the back of the clamping mechanism 22 is fixedly connected with the first lead screw nut 26 and the first guide block 27, respectively. The first guide block 27 is provided with a guide through hole, and the first guide rod 24 passes through the guide through hole on the first guide block 27, and the two slide together. The first lead screw nuts 26 of the clamping mechanism 22 at both ends of the first slide plate 21 are respectively matched with the threads at the corresponding ends of the first bidirectional lead screw 25, and the first lead screw nut 26 of the clamping mechanism 22 at the middle position of the first slide plate 21 is matched with the first lead screw 23. When the first bidirectional lead screw 25 is rotated, the first bidirectional lead screw 25 can drive the clamping mechanism 22 at both ends of the first slide plate 21 to move symmetrically through the first lead screw nut 26.

[0031] One end of the first bidirectional lead screw 25 and the first lead screw 23 are respectively connected to the driving mechanism.

[0032] The clamping mechanism 22 includes a second slide plate 221, a connecting frame 222, an upper clamping plate 223, a lower clamping plate 225, a second screw 224 and a third screw 234. The lower end of the upper clamping plate 223 and the upper end of the lower clamping plate 225 are respectively provided with V-shaped clamping grooves, and the V-shaped clamping grooves of the upper clamping plate 223 and the lower clamping plate 225 are arranged correspondingly. The lower clamping plate 225 is fixedly connected to the lower end of the connecting frame 222, and the upper clamping plate 223 and the side wall of the connecting frame 222 slide up and down.

[0033] The two ends of the upper end wall of the connecting frame 222 are respectively provided with rotating through holes, and the lower end of the rotating through hole at the outer end is fixedly installed with a second lead screw nut 231, and the two rotating through holes are respectively rotatably matched with the rotating sleeve 232. The two rotating sleeves 232 are connected through a transmission mechanism, and a through hole is provided on the rotating sleeve 232. The hole wall of the rotating sleeve 232 is provided with a second guide block 233 distributed along the axis line.

[0034] In the optimized solution, the transmission mechanism is a synchronous belt transmission mechanism.

[0035] The upper end of the upper clamping plate 223 is rotatably connected with the second lead screw 224, and the second lead screw 224 passes through the threaded through hole of the second lead screw nut 231 and the rotating sleeve 232 in sequence and is fixedly connected with the driving mechanism. The second lead screw 224 cooperates with the second lead screw nut 231, and a sliding groove distributed along the axis is provided on the outer wall of the second lead screw 224. The sliding groove of the second lead screw 224 corresponds to the second guide block 233 on the inner wall of the rotating sleeve 232, and the second guide block 233 is placed in the sliding groove of the second lead screw 224, and the two are slidably matched. When the second lead screw 224 rotates, it can drive the upper clamping plate 223 to move up and down, and drive the rotating sleeve 232 to rotate through the second guide block 233.

[0036] The second slide plate 221 is slidably matched with the connecting frame 222, and a slide groove is provided on the second slide plate 221. A third lead screw 234 is installed in the slide groove of the second slide plate 221. The two ends of the third lead screw 234 are respectively rotatably matched with the two end walls of the second slide plate 221. A slide groove distributed along the axis is provided on the outer wall of the upper end part of the third lead screw 234. The slide groove of the third lead screw 234 corresponds to the second guide block 233 on the inner wall of another rotating sleeve 232. The second guide block 233 is placed in the slide groove of the third lead screw 234, and the two are slidably matched.

[0037] The connecting frame 222 is fixedly connected to the first slider 235 , and the first slider 235 is placed in the slide groove of the second slide plate 221 , and the two are slidably matched. The first slider 235 is provided with a threaded through hole, and the third lead screw 234 is threadedly matched with the threaded through hole of the first slider 235 .

[0038] One end of the third lead screw 234 is fixedly connected to the driving mechanism.

[0039] The second lead screw 224 and the third lead screw 234 have opposite thread rotation directions, and the thread lead of the second lead screw 224 is twice the thread lead of the third lead screw 234. When the second lead screw 224 rotates, the third lead screw 234 can be driven to rotate synchronously through the transmission mechanism, the second lead screw 224 drives the upper clamping plate 223 to move through the second lead screw nut 231, and the third lead screw 234 drives the connecting frame 222 to move in the direction opposite to the movement direction of the upper clamping plate 223 through the first slider 235, and the movement distance of the upper clamping plate 223 is twice the movement distance of the connecting frame 222.

[0040] When the two V-grooves of the upper clamping plate 223 and the lower clamping plate 225 are clamped on the main journal of the crankshaft, the center point of the clamping groove formed by the two V-grooves coincides with the center point of the circle of the main journal of the crankshaft. When the upper clamping plate 223 moves in the up and down directions, the connecting frame 222 can move in the opposite direction half the distance, so that the center point position of the clamping groove formed by the two V-grooves always remains unchanged.

[0041] The two groove walls of the V-shaped grooves of the upper clamping plate 223 and the lower clamping plate 225 of the two clamping mechanisms 22 are respectively provided with symmetrically arranged rectangular guide grooves, and clamping blocks 226 are installed in the rectangular guide grooves. The clamping blocks 226 are slidably matched with the rectangular guide grooves. The lower ends of the upper clamping plate 223 and the lower clamping plate 225 are provided with placement grooves, and the placement grooves are connected with the two rectangular guide grooves through guide through holes. A blind hole is provided on the inner end wall of the clamping block 226. One end of the second guide rod 227 is inserted into the blind hole of the clamping block 226 and is connected to the end wall of the blind hole of the clamping block 226 through a spring. The second guide rod 227 is The other end of the rod 227 passes through the guide hole and is fixedly connected to the connecting plate 228. A second bidirectional lead screw 230 is installed in the placement groove. One end of the second bidirectional lead screw 230 is rotatably matched with the end wall of the placement groove, and the other end passes through the through hole of the end wall of the placement groove and is fixedly connected to the knob. Two guide plates 229 are symmetrically installed in the placement groove. One end of the guide plate 229 is provided with an inclined surface, and the other end is provided with a threaded through hole. The two sections of the thread of the second bidirectional lead screw 230 are respectively matched with the corresponding threaded through holes of the guide plate 229, and the inclined surface of the guide plate 229 is in contact with the connecting plate 228.

[0042] When the second bidirectional lead screw 230 is rotated, the second bidirectional lead screw 230 can drive the two guide plates 229 to move symmetrically, and the guide plates 229 can drive the second guide rod 227 to move along the guide through hole through the inclined surface and the connecting plate 228 .

[0043] The processing assembly 3 includes a sliding frame 38, a milling mechanism 32 and a drilling mechanism 33. A long strip opening is provided on the upper end surface of the frame 1. Fixed frames 31 are fixedly installed at both ends of the frame 1. The fixed frame 31 slides with the sliding frame 38. The milling mechanism 32 and the drilling mechanism 33 are installed on the sliding frame 38. The milling mechanism 32 is installed above the drilling mechanism 33.

[0044] The two side walls of the fixed frame 31 are provided with slideways, wherein a fourth lead screw 37 is installed in one slideway, and a third guide rod 35 is installed in the other slideway. A third lead screw nut 36 is fixedly installed on one side of the sliding frame 38, and a third guide block 34 is fixedly installed on the other side. A guide through hole is provided on the third guide block 34. One end of the fourth lead screw 37 is rotatably matched with the fixed frame 31, and the other end is connected to the driving mechanism. The fourth lead screw 37 is matched with the third lead screw nut 36, and the third guide rod 35 passes through the guide through hole of the third guide block 34, and the two are slidably matched. When the fourth lead screw 37 is rotated, it can drive the sliding frame 38 to move up and down along the third guide rod 35.

[0045] The milling mechanism 32 includes a motor and a milling cutter 321, and the motor shaft of the motor is connected to the milling cutter 321 through a chuck. The drilling mechanism 33 includes a motor and a drill bit 331, and the motor shaft of the motor is connected to the drill bit 331 through a drill chuck. The lower ends of the motors of the milling mechanism 32 and the drilling mechanism 33 are respectively fixedly mounted with bases, and two second slide plates 221 are fixedly mounted on the sliding frame 38. The milling mechanism 32 and the drilling mechanism 33 are respectively slidably matched with the corresponding second slide plates 221.

[0046] When the drilling mechanism 33 is at the initial position, the axis of the drill bit 331 thereof coincides with the center point of the clamping groove formed by the two V-shaped grooves of the upper clamping plate 223 and the lower clamping plate 225 .

[0047] An intermediate slide is provided in the middle position of the second slide plate 221, and a fifth lead screw is installed in the intermediate slide. One end of the fifth lead screw is rotatably matched with the second slide plate 221, and the other end is connected to the driving mechanism. A second slider is fixedly installed at the lower end of the base, and a threaded through hole is provided on the second slider. The fifth lead screw cooperates with the threaded through hole of the second slider.

[0048] Side slides are respectively arranged on both sides of the middle slide of the second slide plate 221, and two third sliding blocks are installed at the lower end of the base. The third sliding blocks are placed in the side slides, and the two slides are slidably matched.

[0049] The driving mechanism is a servo motor or a rotating hand wheel.

[0050] The operation process is as follows: when using the present invention, the clamping mechanism 22 is used to clamp the main journal part of the crankshaft. First, the V-grooves of the upper clamping plate 223 and the lower clamping plate 225 of the clamping mechanism 22 without the clamping block 226 are used to clamp a section of the main journal of the crankshaft for positioning. Then, the other two clamping mechanisms 22 with clamping blocks 226 are used to clamp the other two sections of the main journal of the crankshaft to fix the entire crankshaft. Then, the milling mechanism 32 is started to move the milling mechanism 32 downward to perform milling on the end of the crankshaft. Finally, the machining assembly 3 is reset to make the axis center line of the drill bit 331 of the drilling mechanism 33 coincide with the axis center line of the front and rear ends of the crankshaft. The drilling mechanism 33 is started to move the drilling mechanism 33 toward the crankshaft position to perform drilling operations on both ends of the crankshaft.

[0051] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to the present invention without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A crankshaft semi-automatic processing device, comprising a frame (1), a clamping assembly (2) and a processing assembly (3), wherein the processing assemblies (3) are respectively installed at both ends of the frame (1), and the clamping assembly (2) is installed between the two processing assemblies (3); characterized in that: The clamping assembly (2) comprises a clamping mechanism (22), the clamping mechanism (22) comprising a second slide plate (221), a connecting frame (222), an upper clamping plate (223), a lower clamping plate (225), a second lead screw (224) and a third lead screw (234), the upper clamping plate (223) and the lower clamping plate (225) are respectively provided with V-shaped clamping grooves, the two V-shaped clamping grooves are arranged correspondingly, the lower clamping plate (225) is fixedly connected to the connecting frame (222), and the upper clamping plate (223) and the connecting frame (222) are slidably connected. The two ends of the upper end wall of the connecting frame (222) are respectively provided with rotation through holes, and the lower end of the outer end rotation through hole is installed with a second lead screw nut (231), and the two rotation through holes are respectively rotationally matched with the rotation sleeve (232), and the two rotation sleeves (232) are connected through a transmission mechanism, and the rotation sleeve (232) is provided with a through hole, and the hole wall of the rotation sleeve (232) is provided with a second guide block (233); the upper clamping plate (223) is rotationally connected to the second lead screw (224), and the second lead screw (224) is rotationally connected to the second lead screw (224). The rod (224) cooperates with the second lead screw nut (231), and a slide groove is provided on the outer wall of the second lead screw (224); the second slide plate (221) is slidably matched with the connecting frame (222), and a slide groove is provided on the second slide plate (221), and a third lead screw (234) is installed in the slide groove of the second slide plate (221), and the third lead screw (234) is provided with a slide groove distributed along the axis, and the slide grooves of the second lead screw (224) and the third lead screw (234) are respectively connected to the corresponding second guide block (23 3) Sliding fit; the connecting frame (222) is connected to the first slider (235), the first slider (235) is slidably fitted with the slide groove of the second slide plate (221), the first slider (235) is provided with a threaded through hole, and the third lead screw (234) is threadedly fitted with the threaded through hole of the first slider (235); the second lead screw (224) and the third lead screw (234) have opposite thread rotation directions, and the thread lead of the second lead screw (224) is twice the thread lead of the third lead screw (234).

2. The semi-automatic crankshaft processing equipment according to claim 1, characterized in that: A first slide plate (21) is mounted on the upper end of the frame (1), and the clamping mechanism (22) is slidably engaged with the first slide plate (21).

3. The semi-automatic crankshaft processing equipment according to claim 2, characterized in that: Three clamping mechanisms (22) are sequentially installed on the first slide plate (21), and three slide grooves are provided on the first slide plate (21). A first guide rod (24) is installed inside the middle slide groove of the first slide plate (21), and a first bidirectional lead screw (25) and a first lead screw (23) are installed in the other two slide grooves of the first slide plate (21). The back of the clamping mechanism (22) is respectively connected to the first lead screw nut (26) and the first guide block (27), and the first guide block (27) is provided with a guide through hole. The first guide rod (24) passes through the guide through hole on the first guide block (27), and the two are slidably matched. The first lead screw nuts (26) of the clamping mechanisms (22) at both ends of the first slide plate (21) are respectively matched with the threads at the corresponding ends of the first bidirectional lead screw (25), and the first lead screw nut (26) of the clamping mechanism (22) at the middle position of the first slide plate (21) is matched with the first lead screw (23).

4. The semi-automatic crankshaft processing equipment according to claim 3 is characterized in that: The two groove walls of the V-shaped grooves of the upper clamping plate (223) and the lower clamping plate (225) of the two clamping mechanisms (22) are respectively provided with symmetrically arranged rectangular guide grooves, and a clamping block (226) is installed in the rectangular guide groove. The clamping block (226) and the rectangular guide groove are slidably matched. The lower ends of the upper clamping plate (223) and the lower clamping plate (225) are provided with a placement groove, and the placement groove and the two rectangular guide grooves are connected through a guide through hole. A blind hole is provided on the inner end wall of the clamping block (226), and one end of the second guide rod (227) is inserted into the blind hole of the clamping block (226) and is connected to the end of the blind hole of the clamping block (226). The wall is connected by a spring, the other end of the second guide rod (227) passes through the guide through hole and is connected to the connecting plate (228), a second bidirectional lead screw (230) is installed in the placement groove, one end of the second bidirectional lead screw (230) is rotatably matched with the end wall of the placement groove, two guide plates (229) are symmetrically installed in the placement groove, one end of the guide plate (229) is provided with an inclined surface, and the other end is provided with a threaded through hole, two sections of the thread of the second bidirectional lead screw (230) are respectively matched with the corresponding threaded through holes of the guide plate (229), and the inclined surface of the guide plate (229) is in contact with the connecting plate (228).

5. The semi-automatic crankshaft processing equipment according to claim 1, characterized in that: The processing assembly (3) comprises a sliding frame (38), a milling mechanism (32) and a drilling mechanism (33). A long strip opening is provided on the upper end surface of the frame (1). Fixed frames (31) are respectively fixedly mounted on both ends of the frame (1). The fixed frames (31) and the sliding frame (38) are slidably matched. The milling mechanism (32) and the drilling mechanism (33) are mounted on the sliding frame (38). The milling mechanism (32) is mounted above the drilling mechanism (33).

6. The semi-automatic crankshaft processing equipment according to claim 5, characterized in that: The fixed frame (31) is provided with slideways on both side walls, wherein a fourth lead screw (37) is installed in one slideway, and a third guide rod (35) is installed in the other slideway. A third lead screw nut (36) is fixedly installed on one side of the sliding frame (38), and a third guide block (34) is fixedly installed on the other side. A guide through hole is provided on the third guide block (34). One end of the fourth lead screw (37) is rotatably matched with the fixed frame (31), and the other end is connected to the driving mechanism. The fourth lead screw (37) is matched with the third lead screw nut (36), and the third guide rod (35) passes through the guide through hole of the third guide block (34), and the two are slidably matched.

7. The semi-automatic crankshaft processing equipment according to claim 5, characterized in that: The milling mechanism (32) comprises a motor and a milling cutter (321), and the motor shaft of the motor is connected to the milling cutter (321) via a chuck.

8. The semi-automatic crankshaft processing equipment according to claim 5, characterized in that: The drilling mechanism (33) comprises a motor and a drill bit (331), and the motor shaft of the motor is connected to the drill bit (331) via a drill chuck.

9. The semi-automatic crankshaft processing equipment according to claim 5, characterized in that: The lower ends of the motors of the milling mechanism (32) and the drilling mechanism (33) are respectively installed with bases, and two second slide plates (221) are installed on the sliding frame (38). The milling mechanism (32) and the drilling mechanism (33) are respectively slidably matched with the corresponding second slide plates (221); an intermediate slide is provided at the middle position of the second slide plate (221), and a fifth lead screw is installed in the intermediate slide, one end of the fifth lead screw is rotatably matched with the second slide plate (221), and the other end is connected to the driving mechanism, and a second slider is fixedly installed at the lower end of the base, and a threaded through hole is provided on the second slider, and the fifth lead screw is matched with the threaded through hole of the second slider.

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