A grinding workpiece loading and unloading system

Abstract

A grinding workpiece loading and unloading system, comprising: a tapered shaft with a large end and a small end at both ends, and a plurality of sliding grooves are provided on the outer surface. The sliding grooves are divided into a first sliding groove and a second sliding groove, and a transition sliding groove is provided between them. The second sliding groove is located at the small end of the tapered shaft. A sliding seat is slidably connected in all the sliding grooves, and its length is the same as that of the second sliding groove. The two ends are respectively a front end and a rear end. The front end faces the large end of the tapered shaft, and the rear end faces the small end of the tapered shaft. A notch is provided at the outer end of the rear end of the sliding seat. A rotating frame is rotatably connected in the notch, and a spring and an elastic pressing member are connected to the inner side. A pressing ring is movably connected to the rotating frame and can press the lower part of the elastic pressing member against the notch. Through a design of one set and one push, the clearance fit is changed to a transition fit, eliminating the clearance error and ensuring the coaxiality of the outer surface and the inner diameter of the workpiece.

Description

Technical Field

[0001] The present invention relates to the technical field of metal grinding processing, and particularly to a grinding workpiece loading and unloading system. Background Art

[0002] Sleeve parts have high requirements for inner and outer diameter dimensions, coaxiality, surface finish, etc. Grinding processing can provide higher machining accuracy compared to traditional milling and cutting processes.

[0003] Before grinding processing, the workpiece needs to be clamped onto the mandrel. The existing installation method divides the mandrel into three sections. The middle section is used to place the workpiece. A large-diameter cylindrical stop is set on the left, and a small-diameter threaded section is set on the right. The workpiece is placed in the middle section and abuts against the left cylindrical stop, and then the nut is tightened on the right. For example, the patent with the publication number CN202410944254.2 and the name of a processing tool for eliminating thermal deformation of sleeve parts during grinding makes improvements on this clamping method. Steel ball sleeves, etc. are further added to the middle section to reduce the influence of thermal deformation on the accuracy of sleeve parts.

[0004] Since the workpiece and the mandrel are in clearance fit, there must be a tolerance between the two. Then this type of clamping method will overly rely on the machining accuracy of the inner diameter of the workpiece and the middle cylindrical section of the tooling. In the above patent, it is clearly defined that the diameter tolerance, cylindricity, and roundness of the middle cylindrical section of the mandrel are controlled within 0.001 mm, the coaxiality of the middle cylindrical section relative to the B-type center hole is controlled within 0.001 mm, and the tolerance and roundness of the steel balls of the steel ball sleeve are within 0.001 mm. Such high machining accuracy undoubtedly increases the processing cost.

[0005] However, if the diameter tolerance of the middle cylindrical section is too large, the workpiece and the mandrel will have an eccentricity problem due to excessive clearance. Summary of the Invention

[0006] To solve the technical problems existing in the above background art, the present invention provides a grinding workpiece loading and unloading system.

[0007] The technical solution of the present invention is as follows:

[0008] A grinding workpiece loading and unloading system includes:

[0009] A tapered shaft for passing through the workpiece to be ground, with large ends and small ends at both ends, and the sizes of the large ends and small ends respectively correspond to the upper tolerance limit D1 and the lower tolerance limit D2 of the inner hole size of the workpiece;

[0010] A plurality of slideways are provided on the outer surface of the tapered shaft. The slideways are arranged parallel to the axis of the tapered shaft, and the external opening size is smaller than the internal size. For example, the cross-section of the slideway can be a trapezoidal structure;

[0011] The slideway is divided into a first slideway and a second slideway, and a transition slideway is arranged between the two. The second slideway is located at one end of the small end of the conical shaft, and a limiting plate is connected to one end of the small end of the conical shaft for blocking the second slideway.

[0012] The minimum distance between the first slideway and the axis of the conical shaft is D3, and the minimum distance between the second slideway and the axis of the conical shaft is D4, and D3 is greater than D4.

[0013] The sliding seat is slidably connected in part or all of the slideway, and its length is the same as that of the second slideway. The two ends are respectively a front end head and a rear end head. The front end head faces the large end of the conical shaft, and the rear end head faces the small end of the conical shaft. The height h1 of the front end head is less than the height h2 of the rear end head. When the sliding seat slides in the first slideway, the front end head is located in the first slideway, and the rear end head protrudes outside the first slideway.

[0014] A notch is opened at the outer end of the rear end head of the sliding seat, and the notch penetrates through the sliding seat body on the outer side facing outward and the side facing the limiting plate.

[0015] The rotating frame is rotatably connected in the notch, and the rotation axis is perpendicular to the length direction of the slideway. A spring and an elastic pressing member are connected to the inner side. The lower part of the elastic pressing member has a size larger than the size of the notch, and when the spring is in a natural state, it is located outside the notch and does not contact the sliding seat.

[0016] The pressing ring is movably connected to the rotating frame and can press the lower part of the elastic pressing member to squeeze against the notch.

[0017] The biggest invention point of the present invention is to invent a "one - set - one - push" low - cost and fast loading and unloading system.

[0018] First, by processing the conical shaft, the sizes of the two ends correspond to the upper and lower limits of the tolerance of the workpiece. No matter what the inner size of the workpiece is, after being sleeved on the conical shaft, it will always be stuck in a position, changing the clearance fit to an interference fit. This reduces the precision requirements during the processing of the workpiece and the conical shaft. At the same time, as long as the workpiece is clamped with the conical shaft, the clearance error between the two is eliminated, making the workpiece and the conical shaft coaxial. Then, when grinding the outer surface of the workpiece, the coaxiality between the outer surface of the workpiece and the inner diameter can be ensured.

[0019] The difference in the sizes of the two ends of the conical shaft is generally within a few tenths of a millimeter according to the different sizes of the workpiece. Although the workpiece near the large - end of the conical shaft is clamped with the conical shaft in an interference fit, the other end of the workpiece still has a clearance fit with the conical shaft. When the length of the workpiece is small, the influence is not significant, but as the length of the workpiece increases, this clearance will also have a certain impact on the coaxiality of the workpiece and the conical shaft. Therefore, the present invention also specifically designs a sliding seat, a rotating frame and a clamping ring to perform the "one - push" action, pushing the sliding seat along the slideway into the interior of the workpiece, changing the clearance fit here to an interference fit, thereby ensuring the coaxiality of the workpiece and the conical shaft and preventing the workpiece from shaking during the processing on the conical shaft.

[0020] Regarding the design of the conical shaft, the length of the slideway is not less than three times the length of the workpiece, facilitating the sliding of the workpiece to a proper position for clamping. The length of the second slideway is not greater than the length of the workpiece, facilitating the quick entry of the slide block into the first slideway to participate in the limiting work.

[0021] As a preferred solution, the dimensions of the conical shaft and the slide block satisfy:

[0022] D4 + 2*h2 ≤ D2;

[0023] When the slide block is completely located within the second slideway, its highest point does not exceed the outer surface of the conical shaft, facilitating the loading and unloading of the workpiece.

[0024] D3 + 2*h1 ≤ D2, D1 ≤ D3 + 2*h2;

[0025] When the slide block is located within the first slideway, the front end head is necessarily located within the slideway, facilitating the insertion under the workpiece, and the rear end head necessarily protrudes to the outer surface of the conical shaft to achieve clamping with the workpiece.

[0026] As a further preferred implementation, chamfers are provided at both the upper and lower ends of the front end head of the slide block. The upper chamfer facilitates the insertion of the slide block under the workpiece, and the lower chamfer facilitates the entry of the slide block from the second slideway into the first slideway.

[0027] In the present invention, the notch of the slide block can be a square groove structure, which is convenient for manufacturing, and the square groove is perpendicular to the slide block body. A corresponding avoidance groove is provided at the position of the square groove on the limiting plate. The rotating frame can be switched between a horizontal or vertical state, and when the end of the rotating frame turns to the avoidance groove, its outer surface does not protrude above the outer surface of the slide block, facilitating the loading and unloading of the workpiece.

[0028] Regarding the rotating frame, the following structure can be adopted, specifically including:

[0029] A circular sleeve, installed at the included angle position at the bottom of the square groove through a connecting shaft;

[0030] An L-shaped plate, fixed to the outer wall of the circular sleeve, with the long side tangent to the circular sleeve and the short side located outside the square groove, facing the rear end head of the slide block;

[0031] A spring seat, fixed at the connection between the circular sleeve and the L-shaped plate;

[0032] An elastic extrusion member, slidably connected between the spring seat and the short side of the L-shaped plate;

[0033] A spring, fixedly connected between the spring seat and the elastic extrusion member.

[0034] In one embodiment, the cross-section of the elastic extrusion member can be a right-angled trapezoid, with the oblique sides configured for extrusion contact with the pressure ring. Extensions are provided on either side of the right-angled sides, with the extensions being longer than the width of the slot. When the pressure ring presses the elastic extrusion member toward the tapered shaft, the elastic extrusion member is pressed against the rear portion of the slide and the slot, preventing the slide from withdrawing from the workpiece through friction.

[0035] The inner side of the pressure ring is provided with a tapered slope at the end that contacts the elastic extrusion member, and the outer side contacts the inner side of the short side of the unfolded L-shaped plate. The connection between the pressure ring and the L-shaped plate in the rotating frame can be a threaded connection on the outer wall contact surface or a buckle connection on the pressing surface, which can be easily disassembled.

[0036] The large end of the tapered shaft is connected to a transmission clamp, and the workpiece is loaded and unloaded from the small end. After the tapered shaft is tightened on the grinder with a center, the lever on the rotating disk of the grinder moves the transmission clamp to drive the tapered shaft to rotate.

[0037] Through the above design, the grinding workpiece loading and unloading system of the present invention is innovatively designed as a "one set, one push" low-cost and fast loading and unloading system.

[0038] First, by machining a tapered shaft, the dimensions at both ends correspond to the upper and lower tolerance limits of the workpiece. Regardless of the workpiece's internal dimensions, once it is placed on the tapered shaft, it will always lock into place, changing the clearance fit to a transition fit. This reduces the precision requirements for machining the workpiece and the tapered shaft. At the same time, as long as the workpiece and the tapered shaft are engaged, the clearance error between them is eliminated, making the workpiece and the tapered shaft coaxial. Then, when grinding the workpiece's outer surface, the coaxiality of the workpiece's outer surface and inner diameter can be guaranteed, avoiding the problem of poor coaxiality between the workpiece's outer surface and inner diameter due to installation errors.

[0039] The difference in size between the two ends of the tapered shaft varies depending on the size of the workpiece, generally within a few inches. Although the workpiece near the large end of the tapered shaft is connected to the tapered shaft with a transition fit, the other end still has a clearance fit with the tapered shaft. When the workpiece is short, the impact is not significant. However, as the workpiece length increases, the clearance here will also have a certain impact on the coaxiality of the workpiece and the tapered shaft. Therefore, the present invention also specially designs a slide, a rotating frame, and a retaining ring to perform a "push" action, pushing the slide along the slideway into the workpiece, and changing the clearance fit between the workpiece and the tapered shaft here to a transition fit between the workpiece and the slide, thereby ensuring the coaxiality of the workpiece and the tapered shaft, and preventing the workpiece from shaking when machining on the tapered shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In the attached figure:

[0041] Figure 1 State diagram of the grinding workpiece loading and unloading system when loading and unloading workpieces;

[0042] Figure 2State diagram of the workpiece sliding and clamping on the conical shaft;

[0043] Figure 3 Schematic diagram of the rotating frame in the unfolded state on the sliding seat;

[0044] Figure 4 For Figure 2 Partial enlarged view of the Y position in;

[0045] Figure 5 For Figure 2 Cross-sectional view of the Y position in;

[0046] Figure 6 State diagram of the workpiece locked on the conical shaft;

[0047] Figure 7 For Figure 6 Partial enlarged view of the Z position in;

[0048] Figure 8 Cross-sectional view of the pressing ring in contact with the rotating frame;

[0049] The components represented by each reference numeral in the figure are:

[0050] 1. Conical shaft; 11. First slideway; 12. Second slideway; 13. Transition slideway; 14. Limiting plate; 2. Sliding seat; 21. Front end head; 22. Rear end head; 221. Square groove; 3. Rotating frame; 31. Circular sleeve; 32. L-shaped plate; 33. Spring seat; 34. Elastic extrusion part; 35. Spring; 4. Pressing ring; 41. Conical inclined surface; 5. Transmission clamp; 6. Workpiece. Specific implementation method

[0051] See Figure 1 , A grinding workpiece loading and unloading system for grinding operations of bushing-type workpieces, especially precision parts with high coaxiality requirements for inner and outer diameters, specifically including a conical shaft 1, a sliding seat 2, a rotating frame 3 and a pressing ring 4.

[0052] The conical shaft 1 is used to penetrate the workpiece 6 to be ground, with large end heads and small end heads at both ends, and the sizes of the large end heads and small end heads respectively correspond to the upper tolerance limit D1 and lower tolerance limit D2 of the inner hole size of the workpiece 6;

[0053] Several slideways are opened on the outer surface of the conical shaft 1, and the slideways are arranged parallel to the axis of the conical shaft 1, and the external opening size is smaller than the internal size. In this embodiment, 4 slideways are evenly opened on the outer surface of the conical shaft 1, and the cross-section of the slideway is a trapezoidal structure;

[0054] The slideways are divided into a first slideway 11 and a second slideway 12, a transition slideway 13 is arranged between the two, the second slideway 12 is located at the small end head end of the conical shaft 1, and a limiting plate 14 is connected to the small end head end of the conical shaft 1 for blocking the second slideway 12;

[0055] The diameter of the limiting plate 14 is the same as the diameter of the small end.

[0056] The minimum distance between the center line of the bottom edge of the first slideway 11 and the axis of the tapered shaft 1, that is, the vertical distance is D3, and the minimum distance between the center line of the bottom edge of the second slideway 12 and the axis of the tapered shaft 1, that is, the vertical distance is D4, and D3 is greater than D4;

[0057] Slide 2 is connected to the entire slideway and cannot slide out from the limit plate 14. Figure 2 and Figure 3 As shown, its length is the same as that of the second slide 12, and its two ends are a front end head 21 and a rear end head 22 respectively. The front end head 21 faces the large end of the tapered shaft 1, and the rear end head 22 faces the small end of the tapered shaft 1. The height h1 of the front end head 21 is less than the height h2 of the rear end head 22. When the slide 2 slides in the first slide 11, the front end head 21 is located in the first slide 11, and the rear end head 22 is exposed to the outside of the first slide 11. The outer surface is inclined and has an inclination angle opposite to that of the outer surface of the tapered shaft 1. No matter what the inner diameter size of the workpiece 6 to be processed is, when the slide 2 continues to approach the workpiece 6 along the first slide 11, it can always clamp with the workpiece 6 at the appropriate position, thereby limiting its deformation or position shaking during the processing process.

[0058] A slot is formed at the outer end of the rear end head 22 of the slide 2. The slot passes through the slide 2 body on the outward side and the side facing the limit plate 14, forming a rotation space for the rotating frame 3.

[0059] The following combination Figures 3 - 5 Next, we will introduce the rotating frame 3. The rotating frame 3 is rotatably connected to the slot, with the rotation axis perpendicular to the length of the slideway. A spring 35 and an elastic extrusion member 34 are connected to the inner side. The lower portion of the elastic extrusion member 34 is larger than the slot size, and when the spring 35 is in its natural state, it is located outside the slot. During the rotation of the rotating frame 3, there is no contact with the slide 2.

[0060] The pressure ring 4 is movably connected to the rotating frame 3 and can press the lower part of the elastic extrusion member 34 onto the notch.

[0061] The large end of the tapered shaft 1 is connected to a transmission clamp 5, and the workpiece 6 is loaded and unloaded from the small end. After the tapered shaft 1 is tightened on the grinder with a center, the lever on the rotating disk of the grinder drives the transmission clamp 5 to drive the tapered shaft 1 to rotate.

[0062] The most significant invention of the present invention is the invention of a "one set, one push" low-cost quick loading and unloading system.

[0063] First, by processing the tapered shaft 1, the dimensions at both ends correspond to the upper and lower limits of the tolerance of the workpiece 6. Regardless of the internal dimension of the workpiece 6, after being sleeved on the tapered shaft 1, it will always be stuck in a position, changing the clearance fit to an interference fit. This reduces the precision requirements during the processing of the workpiece 6 and the tapered shaft 1. At the same time, as long as the workpiece 6 is clamped to the tapered shaft 1, the clearance error between the two is eliminated, making the workpiece 6 and the tapered shaft 1 coaxial. Then, when grinding the outer surface of the workpiece 6, the coaxiality between the outer surface of the workpiece 6 and the inner diameter can be ensured.

[0064] The dimensional difference at both ends of the tapered shaft 1 is generally between a few tenths of a millimeter according to the different dimensions of the workpiece 6. Although the end of the workpiece 6 close to the large end of the tapered shaft 1 is clamped with an interference fit to the tapered shaft 1, the other end is still in clearance fit with the tapered shaft 1. When the length of the workpiece 6 is small, the influence is not significant. However, as the length of the workpiece 6 increases, this clearance will also have a certain impact on the coaxiality of the workpiece 6 and the tapered shaft 1. Therefore, the present invention also specifically designs a sliding seat 2, a rotating frame 3 and a clamping ring to perform the "pushing" action, pushing the sliding seat 2 along the slideway into the interior of the workpiece 6, changing the clearance fit here to an interference fit, thereby ensuring the coaxiality of the workpiece 6 and the tapered shaft 1, and also preventing the workpiece 6 from shaking during the processing on the tapered shaft 1.

[0065] Regarding the design of the tapered shaft 1, the length of the slideway is not less than 3 times the length of the workpiece 6, which is convenient for the workpiece 6 to slide to a suitable position for clamping. The length of the second slideway 12 is not greater than the length of the workpiece 6, which is convenient for the sliding seat 2 to quickly enter the first slideway 11 to participate in the limiting work.

[0066] As a preferred solution, the dimensions of the tapered shaft 1 and the sliding seat 2 satisfy:

[0067] D4 + 2*h2 ≤ D2;

[0068] When the sliding seat 2 is completely located in the second slideway 12, its highest point does not exceed the outer surface of the tapered shaft 1, which is convenient for the loading and unloading of the workpiece 6.

[0069] Of course, D3 and D4 should not differ too much, and the difference between the two does not exceed 1 / 10 of h1, which is convenient for the sliding seat 2 to enter the first slideway 11 from the second slideway 12.

[0070] D3 + 2*h1 ≤ D2, D1 ≤ D3 + 2*h2;

[0071] When the sliding seat 2 is located in the first slideway 11, the front end head 21 must be located inside the slideway, which is convenient for inserting under the workpiece 6, and the rear end head 22 must be exposed to the outer surface of the tapered shaft 1 to achieve the clamping with the workpiece 6.

[0072] See Figure 3, chamfers are provided at both the upper and lower ends of the front end head 21 of the slide block 2. The upper chamfer facilitates the insertion of the slide block 2 under the workpiece 6, and the lower chamfer facilitates the entry of the slide block 2 from the second slideway 12 into the first slideway 11. The size of the lower chamfer is larger than the difference between D3 and D4.

[0073] See Figure 3 and Figure 4 , in the present invention, the notch of the slide block 2 is a square groove 221 structure, which is convenient for manufacturing. The square groove 221 is perpendicular to the body of the slide block 2. A corresponding avoidance groove is provided at the position of the limiting plate 14 corresponding to the square groove 221. The rotating frame 3 can be switched between a horizontal or vertical state. After the end of the rotating frame 3 is rotated to the avoidance groove, its outer surface does not protrude above the outer surface of the slide block 2, which is convenient for the loading and unloading of the workpiece 6.

[0074] Regarding the rotating frame 3, the following structure can be adopted, specifically including:

[0075] A circular sleeve 31, which is installed at the bottom corner position of the square groove 221 through a connecting shaft;

[0076] An L-shaped plate 32, which is fixed on the outer wall of the circular sleeve 31. The long side is tangent to the circular sleeve 31 and can be parallel and flush with the inner side of the square groove 221 after being unfolded outward. The short side is located outside the square groove 221 and is arranged towards the rear end head 22 of the slide block 2;

[0077] A spring seat 33, which is fixed at the connection between the circular sleeve 31 and the L-shaped plate 32. The width is matched with the diameter of the circular sleeve 31 and can abut against the inner side wall of the square groove 221 when the L-shaped plate 32 is rotated to be parallel to the tapered shaft 1;

[0078] An elastic extrusion member 34, which is slidably connected between the spring seat 33 and the short side of the L-shaped plate 32 and can be made of rubber;

[0079] A spring 35, which is fixedly connected between the spring seat 33 and the elastic extrusion member 34.

[0080] As one of the implementation manners, the cross-section of the elastic extrusion member 34 can be a right trapezoid shape, the hypotenuse is used for extrusion contact with the pressure ring 4, and extension parts are provided on both sides of the right angle side. The length of the extension part is greater than the width of the notch. When the pressure ring 4 extrudes the elastic extrusion member 34 close to the tapered shaft 1, the elastic extrusion member 34 is extruded together with the rear part of the slide block 2 and the notch, and the slide block 2 is prevented from withdrawing from the workpiece 6 through friction.

[0081] The rotating frame 3 has a deployed state and a retracted state:

[0082] Retracted state: See Figure 1 , when initially installing the workpiece 6, the tapered shaft 1 is arranged vertically with the small end facing downwards. The rotating frame 3 rotates towards the small end of the tapered shaft 1 under the action of gravity and rotates out to be in a vertical state outside the limiting plate 14. At this time, the workpiece 6 can be sleeved on the tapered shaft 1 from bottom to top.

[0083] Expanded state: See Figure 2 , flip the tapered shaft 1 with the small end facing upward, the working piece 6 slides down and is clamped on the tapered shaft 1, the L-shaped plate 32 is fixed on one side of the circular sleeve 31, and the center of gravity of the rotating frame 3 is away from the center of the circular sleeve 31 and deviates to one side of the L-shaped plate 31. Under the action of gravity, it flips 90 degrees and leans against the other inner side of the square groove 221, and is perpendicular to the tapered shaft 1.

[0084] After the rotating frame 3 is in the unfolded state, the pressure ring 4 can be installed.

[0085] See also Figures 6 - 8 The inner side of the pressure ring 4 is provided with a tapered slope 41 at the end that contacts the elastic extrusion member 34, and the outer side contacts the inner side of the short side of the expanded L-shaped plate 32. The connection between the pressure ring 4 and the L-shaped plate 32 in the rotating frame 3 can be a threaded connection on the outer wall contact surface, or a buckle connection on the pressing surface, etc., which can be easily disassembled.

[0086] When the pressure ring 4 is installed from top to bottom into the turret 3, it exerts a downward force, further pushing the slide 2 downward to engage the rear end of the workpiece 6. Because the slides 2 are of the same size, after they come into contact with the workpiece 6, they can support the rear end of the workpiece 6 at equal distances, ensuring that the axis of the workpiece 6 is aligned with the tapered shaft 1.

Claims

1. A grinding workpiece loading and unloading system, characterized in that: include: A tapered shaft (1) is used to pass through a workpiece (6) to be ground, with a large end and a small end at both ends, wherein the sizes of the large end and the small end correspond to the upper tolerance limit D1 and the lower tolerance limit D2 of the inner hole size of the workpiece (6); The outer surface of the tapered shaft (1) is provided with a plurality of slideways, the slideways being arranged parallel to the axis of the tapered shaft (1), and the outer opening size being smaller than the inner size; The slideway is divided into a first slideway (11) and a second slideway (12), a transition slideway (13) is provided between the two, the second slideway (12) is located at one end of the small end of the tapered shaft (1), and the small end of the tapered shaft (1) is connected to a limiting plate (14) for blocking the second slideway (12); The minimum distance between the first slideway (11) and the axis of the tapered shaft (1) is D3, the minimum distance between the second slideway (12) and the axis of the tapered shaft (1) is D4, and D3 is greater than D4; The slide (2) is slidably connected in part or all of the slide, has the same length as the second slide (12), and has a front end head (21) and a rear end head (22) at both ends. The front end head (21) faces the large end of the tapered shaft (1), and the rear end head (22) faces the small end of the tapered shaft (1). The height h1 of the front end head (21) is less than the height h2 of the rear end head (22). When the slide (2) slides in the first slide (11), the front end head (21) is located in the first slide (11), and the rear end head (22) is exposed outside the first slide (11). A slot is formed at the outer end of the rear end head (22) of the slide seat (2), and the slot passes through the slide seat (2) body on the side facing outward and the side facing the limit plate (14); A rotating frame (3) is rotatably connected in the slot, with a rotation axis perpendicular to the length direction of the slideway, and a spring (35) and an elastic extrusion member (34) are connected to the inner side, wherein the lower portion of the elastic extrusion member (34) is larger than the slot size, and when the spring (35) is in a natural state, it is located outside the slot and does not contact the slide seat (2); The pressure ring (4) is movably connected to the rotating frame (3) and can press the lower part of the elastic extrusion member (34) to be squeezed on the notch.

2. A grinding workpiece loading and unloading system according to claim 1, characterized in that: The cross section of the slideway is trapezoidal.

3. A grinding workpiece loading and unloading system according to claim 1, characterized in that: The length of the slideway is not less than three times the length of the working piece (6), and the length of the second slideway (12) is not greater than the length of the working piece (6).

4. A grinding workpiece loading and unloading system according to claim 3, characterized in that: The dimensions of the tapered shaft (1) and the sliding seat (2) satisfy: D4+2*h2≤D2; D3+2*h1≤D2; D1≤D3+2*h2.

5. A grinding workpiece loading and unloading system according to claim 1, characterized in that: The upper and lower ends of the front end head (21) of the slide seat (2) are both chamfered.

6. A grinding workpiece loading and unloading system according to claim 1, characterized in that: The notch of the slide (2) is a square groove (221), and a corresponding avoidance groove is provided on the position of the limiting plate (14) corresponding to the square groove (221). After the end of the rotating frame (3) rotates to the avoidance groove, the outer surface does not exceed the outer surface of the slide (2).

7. A grinding workpiece loading and unloading system according to claim 6, characterized in that: The rotating frame (3) comprises: The circular sleeve (31) is mounted at the bottom angle of the square groove (221) via a connecting shaft; An L-shaped plate (32) is fixed to the outer wall of the circular sleeve (31), with its long side tangent to the circular sleeve (31) and its short side located outside the square groove (221) and arranged toward the rear end head (22) of the slide seat (2); A spring seat (33) is fixed at the junction of the circular sleeve (31) and the L-shaped plate (32); an elastic extrusion member (34) slidably connected between the spring seat (33) and the short side of the L-shaped plate (32); The spring (35) is fixedly connected between the spring seat (33) and the elastic extrusion member (34).

8. A grinding workpiece loading and unloading system according to claim 7, characterized in that: The cross section of the elastic extrusion piece (34) is a right-angled trapezoidal shape, the oblique side is used for extrusion contact with the pressure ring (4), and extensions are provided on both sides of the right-angled side, and the length of the extension is greater than the width of the slot.

9. A grinding workpiece loading and unloading system according to claim 8, characterized in that: The inner side of the pressure ring (4) is provided with a conical inclined surface (41) at one end in contact with the elastic extrusion member (34), and the outer side is in contact with the inner side surface of the short side of the L-shaped plate (32) after it is unfolded.

10. The grinding workpiece loading and unloading system according to claim 1, characterized in that: A transmission clamp (5) is connected to one end of the large end of the tapered shaft (1), and a working piece (6) is assembled and disassembled from one end of the small end.

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