Slender piece grinding method and corresponding multi-workpiece synchronous grinding equipment

Abstract

The invention relates to a long and thin piece grinding method and corresponding multi-workpiece synchronous grinding equipment. A plurality of workpiece sleeves are arranged on the same workpiece clamp, main body parts of a plurality of slender pieces are inserted into different workpiece sleeves respectively, the slender pieces are pressed forwards from the rear ends by using the same workpiece pressing device, and the tails of the slender pieces are clamped outside the rear ends of the workpiece sleeves; the workpiece sleeves and the slender pieces which are fixed together on the workpiece clamp are ground together, the workpiece clamp of the grinding equipment is provided with a fixed row plate composed of a base plate and a plurality of workpiece sleeves, the workpiece sleeves are located on the front side of the base plate and arranged on the same plane in parallel, the rear ends of the workpiece sleeves are in threaded connection with the base plate, and the workpiece sleeves are arranged on the base plate. A workpiece pressing device used for pressing the rear end of the workpiece forwards is arranged on the rear side of the base plate. The multi-workpiece synchronous grinding device is suitable for multi-workpiece synchronous grinding of long and thin workpieces, workpiece bending in the grinding process can be relieved or avoided, and the grinding quality is improved.

Description

Technical Field

[0001] The invention relates to a slender piece grinding method and corresponding multi-workpiece synchronous grinding equipment. Background Art

[0002] In practice, there are many forms of slender workpieces that need to be ground at the end, for example, a needle knife that combines an acupuncture needle and a scalpel into one. The needle knife consists of a handle, a needle body and a blade, and is generally made of metal material. It is an acupuncture tool that looks like both a needle and a knife. At present, general-purpose grinders are not suitable for grinding such slender workpieces. If a grinder is used for grinding, the workpiece is prone to bending due to the force on the grinding end, and it slides or deflects on the grinding wheel, resulting in an uneven needle tip, low production efficiency, and a high scrap rate.

[0003] Some special grinding technologies for slender workpieces have been developed. For example, Chinese patent document CN109986465A discloses a fixture for slender workpieces, a grinding tool and a grinding method, including a fixture for slender workpieces, which is composed of two half-molds with matching shapes after being molded together, and the half-molds include: an adjustment groove, which is a groove opened on the mold surface of the half-mold along the length direction of the half-mold; a fastening mechanism, which is used to keep the two half-molds in a relatively static state after the mold is molded together; and also includes a slender workpiece grinding tool, including an installation tool, a disassembly tool and a grinding installation tool; the present invention clamps the slender workpieces to be processed in batches in the fixture after the two half-molds are molded together, and uses the grinding tool to assist in placing the slender workpieces, adjusting the slender workpieces, and installing the molds, and completes the grinding of slender workpieces with blade faces of different angles, symmetrical front and back blades, and no left and right corners in simple and effective steps, so as to achieve batch processing of slender workpieces, low production cost, high production efficiency, and low product defect rate. Chinese patent document CN107745293A discloses a needle head blade grinding device for a sterile needle knife, which is arranged on one side of a rotating station of a rotary feeder that clamps the sterile needle knife, and includes a frame, a walking bottom frame, a linear slide rail, a sliding rail seat, an upper grinding mounting plate, a lower grinding mounting plate, an upper grinding cylinder, a lower grinding cylinder, an upper grinding clamp and a lower grinding clamp. The upper grinding clamp and the lower grinding clamp are matched and closed to clamp the sterile needle knife arranged on the rotating station between the grinding parts of the two grinding clamps. After the upper grinding clamp and the lower grinding clamp are closed, the blade of the sterile needle knife is ground as a whole. Chinese patent document CN110052927A discloses a special grinding tool for medicine feeding needle knives and a batch grinding processing method thereof, wherein the needle tip is ground using a special grinding tool, and the special grinding tool comprises a special fixture and a grinding installation tool; wherein: the special fixture is composed of two half molds of matching shapes after being molded together; the grinding installation tool comprises a mounting groove three and a workpiece support surface two; the mounting groove three is a downward groove on the upper surface of the grinding installation tool, and by clamping the medicine feeding needle knives to be processed in batches in the special fixture, the medicine feeding needle knives are placed, adjusted, and molded together with the assistance of the grinding tool, and the grinding processing of medicine feeding needle knives with blade surfaces of different angles, symmetrical front and back blades, and no sharp corners on the left and right can be completed in simple and effective steps. These existing technologies have their own characteristics and can be used to implement the grinding of slender workpieces, but they are complex in structure and inconvenient to operate. In particular, the workpiece needs to extend from the mold to a certain length, and it is still easy to bend to a certain extent, which restricts the improvement of grinding quality. Therefore, in practice, high-quality grinding of such workpieces still depends on manual work. Not only is the grinding quality greatly affected by the personal factors of the operator, but the work efficiency is also low. Summary of the invention

[0004] The purpose of the present invention is to provide a method for grinding a slender workpiece and a multi-workpiece synchronous grinding device for implementing the method, so as to reduce or avoid bending of the workpieces during the grinding process and provide favorable conditions for improving the mechanized grinding quality of the slender workpieces.

[0005] The technical solution of the present invention is: a slender workpiece grinding method, the main part of the slender workpiece (or slender workpiece, referred to as workpiece) is fixedly inserted in the workpiece sleeve, and according to the grinding requirements of the slender workpiece, the workpiece sleeve and the slender workpiece fixed together are ground together.

[0006] Furthermore, a plurality of workpiece sleeves are arranged on the same workpiece fixture (referred to as the fixture), and the main parts of the plurality of slender pieces are respectively inserted into different workpiece sleeves, and the slender pieces are pressed from the rear end to the front by the same workpiece clamping device, and the tail of the slender piece is clamped outside the rear end of the workpiece sleeve, thereby achieving the fixation of the slender piece on the workpiece sleeve, and the various groups of workpiece sleeves and slender pieces on the workpiece fixture are ground together.

[0007] Furthermore, a cylindrical grinding wheel spindle is used to implement synchronous grinding of various groups of workpiece sleeves and slender parts on the same fixture.

[0008] Control or adjust the grinding angle according to the blade (edge) grinding requirements of slender parts.

[0009] This slender piece grinding method can be used for grinding the front end edge of the slender piece, and any multi-workpiece synchronous grinding device suitable for slender pieces disclosed in the present invention can be used to implement this slender piece grinding method to grind the slender piece (the front end edge).

[0010] A multi-workpiece synchronous grinding device suitable for slender pieces can be used to implement the synchronous grinding of multiple workpieces by using any of the slender piece grinding methods disclosed in the present invention. A workpiece fixture (referred to as fixture) is provided. The needle knife fixture is provided with a base plate. A plurality of workpiece sleeves are provided on the base plate. The workpiece sleeves are located on the front side of the base plate, arranged parallel to each other on the same plane, and form a row plate together with the base plate. A sleeve through hole for installing the workpiece sleeve is provided on the base plate. The rear end of the workpiece sleeve can be detachably connected (connected in a detachable connection manner) to the sleeve through hole of the base plate. A workpiece clamping device for pressing the rear end of the workpiece forward is provided on the rear side of the base plate. Before grinding, the main parts of the plurality of slender pieces to be ground are respectively inserted into different workpiece sleeves through different threaded through holes, and the rear end of each slender piece is pressed forward by the workpiece clamping device, so that each slender piece is fixed together with the workpiece sleeve where it is located, and the length of the workpiece sleeve is adapted to the length of the main part of the slender piece, so that the front end cutting edge of the slender piece does not exceed the front end of the workpiece sleeve.

[0011] Preferably, the sleeve through hole is provided with an internal thread to form a threaded through hole, and the rear portion of the workpiece sleeve is provided with an external thread to be threadedly connected to the sleeve through hole, thereby achieving a detachable connection of the rear end of the workpiece sleeve on the substrate.

[0012] Preferably, in the above situation, the rear end of the workpiece sleeve is aligned with the rear end of the sleeve through hole of the substrate.

[0013] Preferably, in the above situation, the rear port of the workpiece sleeve is provided with a chamfered structure, or in other words, the rear port is a conical (frustum-shaped) mouth / bell mouth, so as to facilitate the insertion of the slender member.

[0014] Preferably, the sleeve through hole is a stepped hole, that is, it is divided into two sections, the front section and the rear section are equal diameter holes, wherein the aperture of the front section is larger than the aperture of the rear end, and is adapted to the outer diameter of the workpiece sleeve, and the rear end of the workpiece sleeve is inserted into the front section of the sleeve through hole, and is tightly matched with the sleeve through hole, thereby realizing the detachable connection of the rear end of the workpiece sleeve on the substrate. The tightness of the rear end of the workpiece sleeve and the front end of the sleeve through hole should allow the workpiece sleeve to be manually inserted and pulled out, but after insertion, it will not move or fall out by itself due to external forces during operation).

[0015] Preferably, in the above situation, the rear end of the workpiece sleeve abuts against the annular end surface between the front and rear ends of the sleeve through hole, thereby limiting / positioning the workpiece sleeve.

[0016] Preferably, in the above situation, the aperture of the rear section of the sleeve through hole is not larger than the rear end aperture of the workpiece sleeve.

[0017] Preferably, in the above situation, the rear port of the sleeve through hole is provided with a chamfered structure, or in other words, the rear port is a conical (frustum-shaped) mouth / bell mouth, so as to facilitate the insertion of the slender member.

[0018] Preferably, the workpiece sleeve is a metal tube with required rigidity to avoid bending during grinding. For example, the workpiece sleeve is a capillary tube made of metal.

[0019] Preferably, the workpiece clamping device includes a pressing plate and a clamping screw (stud or bolt), the clamping screw is perpendicular to the base plate, the front end of the clamping screw is connected (fixedly connected or axially limitedly connected) to the base plate, the pressing plate is sleeved on the clamping screw through the screw through hole on the pressing plate, and the rear end of the clamping screw is exposed from the rear side of the pressing plate and is screwed (threadedly connected) with a clamping nut.

[0020] Preferably, the number of the clamping screws may be two, which are located at two side locations (two side locations of the pressure plate and the base plate) to facilitate balance.

[0021] The clamping nut can be a butterfly nut to facilitate operation.

[0022] Preferably, an elastic pad, such as a rubber pad, is provided between the clamping nut and the pressing plate to prevent the clamping nut from loosening during operation.

[0023] The rubber pad or other elastic pad can be in the form of a washer and sleeved on the compression screw.

[0024] Preferably, the workpiece clamping device includes a pressure plate and a pressure plate guide rod, the pressure plate guide rod is perpendicular to the base plate, and its front end is fixed on the base plate, the pressure plate is sleeved on the pressure plate guide rod through a guide through hole or a guide sleeve on the pressure plate, the guide through hole or the guide sleeve is slidably matched with the pressure plate guide rod, allowing the pressure plate to slide along the guide rod direction and not allowing it to rock on the guide rod, the rear end of the pressure plate guide rod is exposed from the rear side of the pressure plate and is provided with a pressure plate limiting structure (for example, a baffle that can stop the pressure plate from continuing to move backward), and a tension spring (for example, a pre-stretched coil spring) is sleeved on the pressure plate guide rod, the front end of the tension spring is connected to the base plate, and the rear end is connected to the pressure plate, so that the pressure plate is pulled toward the base plate, and the pressure plate is pressed tightly against the rear end of the workpiece exposed from the rear end of the sleeve through hole.

[0025] Preferably, there are two pressure plate guide rods located on both sides to facilitate balance.

[0026] Preferably, the pressing plate is a V-shaped plate, or in other words, adopts a V-shaped groove structure, and its cross section is a V-shaped convex backward. When the pressing plate is pressed against the rear end of the workpiece, the rear end of the workpiece is located in the V-shaped groove, thereby automatically achieving centering and stability, and preventing the pressing plate from tilting or the rear end of the workpiece from sliding sideways.

[0027] Furthermore, this multi-workpiece synchronous grinding equipment is provided with a frame (or bed), on which a spindle system (or grinding wheel system) and a feed system (or workpiece system) are provided, the spindle system includes a spindle motor and a grinding wheel shaft, the spindle motor is connected to the grinding wheel shaft through a belt drive mechanism (or other forms of spindle drive mechanism), a cylindrical grinding tool (grinding wheel) is arranged on the grinding wheel shaft, the feed system includes a linear feed mechanism, the driven member (output member, for example, feed frame) of the linear feed mechanism is a transverse (perpendicular to the feed direction) feed frame, a support plate is provided on the support plate, and a clamping device for clamping the workpiece clamp is provided on the support plate.

[0028] The support plate is connected to the feed frame via a fixed connector or any other suitable direction.

[0029] Preferably, the support plate is connected to the feed frame via an angle adjustment mechanism to adjust the grinding angle of the cutting edge.

[0030] Preferably, both ends of the support plate are provided with claws for clamping the workpiece fixture, and clamping plates for pressing the clamped part onto the claws.

[0031] The beneficial effects of the present invention are as follows: since the workpiece sleeve / capillary is ground together with the workpiece, the slender workpiece is always kept in the capillary during the grinding process, and the bending of the workpiece during the grinding process is avoided or significantly reduced by the support of the capillary, which is conducive to improving the grinding quality; since the capillary is threadedly connected to the base plate, it is easy to replace; since the capillary can be commercially available or other existing products, the cost is low; since a pressing plate is provided to press the workpiece at the rear end of the workpiece, the workpiece is pressed tightly by the thread, ensuring that the workpiece and the capillary are strictly synchronized during the grinding process, and the workpiece will not move backward due to the grinding pressure, ensuring The front end of the workpiece can be ground; since multiple groups of capillaries and workpieces can be assembled in the same fixture and a cylindrical grinding wheel shaft is used for grinding, multiple workpieces can be ground synchronously at the same time, which greatly improves the processing efficiency; since a linear feed mechanism is used to implement the linear feed of the fixture and an angle adjustment mechanism is used to adjust the grinding angle of the workpiece, the grinding angle and grinding speed can be controlled according to the process requirements, which is suitable for the grinding requirements of different workpiece blades, and compared with existing ordinary and special grinders, the structure of the grinder and tooling is significantly simplified, which is convenient for operation or control and is conducive to reducing system errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram (front view) of a workpiece fixture according to the present invention; Figure 2 is a schematic diagram (side view) of a workpiece fixture according to the present invention; Figure 3 is a schematic diagram of a capillary tube involved in the present invention (front view); Figure 4 is a schematic diagram (front view) of a grinding machine according to the present invention; Figure 5 is a schematic diagram of a grinding machine to which the present invention relates (top view); Figure 6 It is a schematic diagram of the grinding motor and the connection with the belt transmission mechanism involved in the present invention; Figure 7 It is a schematic diagram of a grinding wheel shaft involved in the present invention; Figure 8 is a schematic diagram of a clamp operating mechanism according to the present invention, Fig. 9 It is a schematic diagram of the grinding machine involved in the present invention (left view). DETAILED DESCRIPTION

[0033] See also Figure 1-Figure 9The workpiece fixture is mainly composed of a pressing plate 24, a base plate 21 and a plurality of workpiece sleeves 22 for fixing the workpiece. The workpiece sleeve can be a metal thin tube with the required rigidity, for example, a commercially available capillary tube, whose diameter is adapted to the main part of the workpiece (slender part), and the main part of the workpiece can be manually inserted and pulled out. The workpiece sleeve relies on the constraint of the tube hole to fix the workpiece inserted therein so that it cannot shake or move eccentrically.

[0034] The main body of the slender member is in the shape of a long strip (e.g., a long cylinder), with a cutting edge at the front end, and the rear part (e.g., the handle of the needle knife) 13 is thicker than the main body and cannot be inserted into the workpiece sleeve. The aperture size of the workpiece sleeve (e.g., a capillary tube) is adapted to the main body of the slender member, as long as the main body of the slender member can be inserted and pulled out. The gap between the two should be minimized as much as possible to avoid eccentricity or shaking of the main body of the slender member in the tube that affects the processing quality. In this case, the gap between the two can be called zero gap or near-zero gap.

[0035] Multiple workpiece sleeves are arranged on the same fixture so that multiple workpieces can be ground synchronously during the same operation.

[0036] Since the workpiece sleeve is ground together with the workpiece, the workpiece sleeve needs to be replaced. The rear end (with external threads) 27 of the workpiece sleeve is screwed (threaded) on the threaded through hole of the base plate to facilitate installation and removal.

[0037] The rear port of the workpiece sleeve is chamfered to form a small cone (cone-shaped) mouth (or bell-shaped) shape to facilitate the insertion of the workpiece, and its cone angle β can be about 90°.

[0038] The pressure plate adopts a V-shaped groove structure, with the middle of the front side concave backwards. When pressed on the rear end of the workpiece, the rear end of the workpiece is automatically centered to the center of the V-shaped groove and is in a stable state, thereby avoiding the rear end of the workpiece from deflecting or slipping due to factors such as the tilt of the pressure plate.

[0039] Two (or more) clamping screws (studs) 23 can be provided to realize the connection between the pressure plate and the base plate. The rear of the workpiece is clamped between the pressure plate and the base plate. The workpiece can be clamped by tightening the clamping nut 26 located on the rear side of the pressure plate. The rear of the thicker workpiece is pressed and stuck to the rear end of the threaded through hole on the base plate or the rear end of the workpiece sleeve (depending on the relative thickness of the rear part of the workpiece and the screw through hole), thereby fixing the workpiece.

[0040] Before screwing the clamping nut, first put the rubber pad (washer) 25 on the screw rod. After tightening the clamping nut, the rubber pad between the clamping nut and the pressure plate is deformed under pressure to prevent the clamping nut from loosening due to vibration during operation.

[0041] The clamping screw can be a stud, or a single-head bolt, or any other suitable rod-shaped object that can cooperate with the thread of the clamping nut. Any suitable technology can be used to achieve the connection between the lower end of the screw and the base plate. The connection can be a fixed connection (for example, welding) or a limited connection (limiting the screw from being withdrawn backward from the base plate). For example, the head of the single-head bolt is placed on the front side of the base plate, and a flare that conforms to the bolt head and is used to accommodate the bolt head and limit the rotation of the bolt can be provided at the front end of the through hole on the base plate for passing the bolt.

[0042] The grinding tool 35 in the grinding machine is cylindrical, with shaft extensions at both ends for mounting bearings (at both ends) and the driven wheel 34 (at one end) of the belt transmission mechanism 33, which can be called a grinding wheel shaft. The spindle motor 32 drives the grinding wheel shaft to rotate through the belt transmission mechanism. The feeding direction of the feeding mechanism is perpendicular to the axial direction of the grinding wheel shaft, and the axial direction of each workpiece sleeve is also perpendicular to (non-planar and perpendicular to) the axial direction of the grinding wheel shaft. Therefore, the grinding progress can be controlled by the feeding mechanism, and the synchronous grinding of multiple workpieces (and the workpiece sleeves on the workpieces) on the workpiece fixture can be implemented.

[0043] The linear feed mechanism is provided with a feed frame 37 used as an output member, and the feed frame moves linearly. The linear feed mechanism can adopt any linear motion mechanism, for example, a linear guide mechanism and a corresponding drive motor is provided. As a preferred embodiment, the linear feed mechanism can include two longitudinal (along the feeding direction) parallel light rods (for example, cylindrical shafts) 36 and a feed frame (or beam) 37 perpendicular to the light rods. The light rods are fixedly mounted on the frame (table) 31 through light rod brackets. The feed frame is located above the light rods, and bearing seats 38 are provided below the two sides thereof, and auxiliary parts such as positioning screws 39 for positioning the bearing seats are provided. Linear bearings that cooperate with the corresponding side light rods are installed on the bearing seats, thereby realizing the longitudinal movement connection between the feed frame and the light rods. The drive of the feed rack can be achieved based on the existing technology or any other suitable technology. For example, a screw-nut mechanism and a feed motor for driving the screw are provided, the nut of the screw-nut mechanism is fixedly mounted on the feed rack, the screw is rotatably mounted on the frame and is drive-connected to the feed motor, the screw is driven to rotate by the feed motor, and then the feed rack is driven to move by the nut; or a feed oil cylinder / pneumatic cylinder is provided on the frame to drive the feed rack to move.

[0044] An angle adjustment mechanism is provided on the feed frame, and the angle adjustment mechanism drives the support plate 41 to move, so as to adjust the posture / angle of the support plate. For example, an angle adjustment shaft 47 is rotatably connected to the feed frame through a bearing, an angle adjustment motor for driving the angle adjustment shaft to rotate is installed on the feed frame, and the support plate is fixedly connected to the angle adjustment shaft through a connecting member (connecting plate) 43, thereby realizing the angle control and adjustment of the support plate through the angle adjustment motor.

[0045] The claws at both ends of the bracket plate extend forward of the bracket plate, and the claws are provided with limit steps for clamping the corresponding side edges of the substrate (the substrate of the workpiece fixture). The L-shaped structures on the surfaces of the two limit steps are opposite, and the clamping plate 42 is located on the outside of the limit steps and is fixed to the corresponding claws by clamping plate screws. When in use, the edge parts of the substrate of the workpiece fixture are placed in the L-shaped structure, fit with the surface of the L-shaped structure, press the clamping plate on the outside of the edge part of the substrate, and tighten it with the clamping plate screws, so that the edge parts on both sides of the substrate are clamped between the limit step and the clamping plate on the corresponding side. After the workpiece fixture is installed in place, the pressure plate is located in the space between the two jaws. The length of the pressure plate should usually be less than the length of the base plate and be able to cover / press the entire workpiece sleeve to adapt to the space between the two jaws. The workpiece sleeve extends forward and is tilted downward at a corresponding angle according to the angle adjustment of the rotating shaft, toward the grinding wheel shaft. The setting height of the grinding wheel shaft is lower than the height of the feed frame. Through the feeding movement of the feed frame, the workpiece sleeve and the front end of the workpiece are brought into contact with the abrasive surface of the grinding wheel shaft to implement grinding at a corresponding angle.

[0046] Unless otherwise specified or when one preferred or optional technical means is a further limitation of another technical means, the preferred and optional technical means disclosed in the present invention can be arbitrarily combined to form several different specific implementation methods.

Claims

1. A method for grinding slender parts, characterized in that The main body of the slender piece is fixedly inserted in the workpiece sleeve. According to the grinding requirements of the slender piece, the workpiece sleeve and the slender piece fixed together are ground together.

2. The method for grinding a slender piece according to claim 1, characterized in that A plurality of workpiece sleeves are arranged on the same workpiece fixture, and the main parts of a plurality of slender pieces are respectively inserted into different workpiece sleeves, and each slender piece is pressed from the rear end to the front by the same workpiece clamping device, and the tail of the slender piece is clamped outside the rear end of the workpiece sleeve, and the workpiece sleeves and slender pieces fixed together in each group on the workpiece fixture are ground together.

3. The method for grinding a slender piece according to claim 2, characterized in that A cylindrical grinding wheel spindle is used to implement synchronous grinding of various groups of workpiece sleeves and slender parts on the same fixture.

4. The method for grinding a slender piece according to claim 3, characterized in that Control or adjust the grinding angle according to the edge grinding requirements of slender parts.

5. Suitable for multi-workpiece synchronous grinding equipment of slender parts, characterized by The synchronous grinding of multiple workpieces is implemented by the slender piece grinding method described in any one of claims 1 to 4, and a workpiece clamp is provided. The needle knife clamp is provided with a base plate, and a plurality of workpiece sleeves are provided on the base plate. The workpiece sleeves are located on the front side of the base plate and are arranged parallel to each other on the same plane. The base plate is provided with sleeve through holes for installing the workpiece sleeves. The rear end of the workpiece sleeve is detachably connected to the sleeve through hole of the base plate, and the rear side of the base plate is provided with a workpiece clamping device for pressing the rear end of the workpiece forward.

6. The multi-workpiece synchronous grinding equipment according to claim 5, characterized in that The sleeve through hole is provided with an internal thread to form a threaded through hole, and the rear part of the workpiece sleeve is provided with an external thread, which is threadedly connected to the sleeve through hole, thereby realizing a detachable connection of the rear end of the workpiece sleeve on the substrate.

7. The multi-workpiece synchronous grinding equipment according to claim 5, characterized in that The sleeve through hole is a stepped hole, which is divided into two sections, front and rear sections, both of which are equal-diameter holes, wherein the aperture of the front section is larger than the aperture of the rear end, and is adapted to the outer diameter of the workpiece sleeve, and the rear end of the workpiece sleeve is inserted into the front section of the sleeve through hole and fits tightly with the sleeve through hole, thereby realizing the detachable connection of the rear end of the workpiece sleeve on the substrate.

8. The multi-workpiece synchronous grinding equipment according to any one of claims 5 to 7, characterized in that The workpiece sleeve is a metal pipe with required rigidity.

9. The multi-workpiece synchronous grinding equipment according to any one of claims 5 to 7, characterized in that The workpiece clamping device includes a pressing plate and a clamping screw. The clamping screw is perpendicular to the base plate. The front end of the clamping screw is connected to the base plate. The pressing plate is sleeved on the clamping screw through the screw through hole on the pressing plate. The rear end of the clamping screw is exposed from the rear side of the pressing plate and is screwed with a clamping nut.

10. The multi-workpiece synchronous grinding equipment according to any one of claims 5 to 7, characterized in that The workpiece clamping device includes a pressure plate and a pressure plate guide rod. The pressure plate guide rod is perpendicular to the base plate, and its front end is fixed on the base plate. The pressure plate is sleeved on the pressure plate guide rod through a guide through hole or a guide sleeve on the pressure plate. The guide through hole or the guide sleeve is slidably matched with the pressure plate guide rod. The rear end of the pressure plate guide rod is exposed from the rear side of the pressure plate and is provided with a pressure plate limiting structure. A tension spring is sleeved on the pressure plate guide rod, and the front end of the tension spring is connected to the base plate, and the rear end is connected to the pressure plate.

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