Sandblasting protection jig

Abstract

This utility model discloses a sandblasting protective fixture, relating to the field of sandblasting fixture technology. The utility model includes a base frame; a fixed plate is fixedly connected to the top of the base frame, and a shielding component is provided on the top of the fixed plate; the fixed plate includes a chassis fixedly connected to the top of the base frame, a central groove and four sliding grooves communicating with the central groove are formed at the center of the top of the chassis, and through mounting openings are formed at each of the four corners of the chassis; a first electromagnet is installed inside the central groove, a sliding rod is slidably connected inside the sliding groove, a slider is installed outside the sliding rod, and a clamping block is installed on the top of the slider. This utility model uses the first electromagnet of the fixed plate to attract the sliding rod, causing the clamping block to automatically clamp the workpiece, and automatically releases it with the help of a return spring. Combined with the slider adjusting its position along the sliding rod, it can quickly adapt to and stably fix workpieces of different specifications, enhancing the fixture's adaptability to different workpieces.

Description

Technical Field

[0001] This utility model belongs to the field of sandblasting fixture technology, and in particular relates to a sandblasting protective fixture. Background Technology

[0002] Sandblasting is a surface treatment process that uses compressed air to propel abrasive at high speed onto the surface of a workpiece. Its core functions include removing oxide scale, rust, oil, and mold residue from the workpiece surface, optimizing the surface roughness to improve the adhesion of subsequent coatings such as paint and plating, and strengthening the workpiece surface to enhance its wear resistance, fatigue resistance, and corrosion resistance. During sandblasting, to prevent the workpiece from shifting under the impact of the high-speed abrasive stream and to ensure precise control of the sandblasting area, a special sandblasting protective fixture must be used to position and clamp the workpiece.

[0003] Currently, most existing sandblasting protective fixtures use a fixed-size clamping structure or require manual adjustment of the clamping distance by turning multiple sets of bolts. The former can only be used for workpieces of a single specification, with extremely poor versatility. When dealing with workpieces of different sizes and shapes, the fixture needs to be changed frequently. The latter is time-consuming and laborious to adjust, and manual adjustment makes it difficult to ensure uniform clamping force. It is easy to cause workpiece displacement due to excessively loose clamping or workpiece surface damage due to excessively tight clamping.

[0004] To address these issues, we provide a sandblasting protective fixture. Utility Model Content

[0005] The purpose of this utility model is to provide a sandblasting protective fixture, which uses a first electromagnet to attract the slide rod and drive the clamping block to hold the workpiece through a fixed plate. With the help of the slider adjusting the position along the central rod and the return spring automatically releasing the workpiece, it can adapt to workpieces of different specifications and solve the problem of poor adaptability of existing sandblasting fixtures to clamp workpieces of different specifications.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a sandblasting protective fixture, including a base frame; a fixing plate for fixing the workpiece to be treated is fixedly connected to the top of the base frame, and a shielding component for shielding the part of the workpiece to be treated that does not need sandblasting treatment is provided on the top of the fixing plate.

[0008] The fixed plate includes a chassis fixedly connected to the top of the base frame. A central groove and four sliding grooves connected to the central groove are provided at the center of the top of the chassis. A through mounting port is provided at each of the four corners of the chassis. A first electromagnet is installed inside the central groove. A sliding rod is slidably connected inside the sliding groove. A slider is installed outside the sliding rod. A clamping block for holding the workpiece to be processed is installed on the top of the slider.

[0009] The shielding assembly includes four sleeves that are movably fitted inside corresponding sliding grooves. A second electromagnet is fixedly connected to the bottom of each of the four sleeves. A sliding post is movably fitted inside each of the four sleeves, and the sliding post is attracted to the top of the corresponding second electromagnet. A fixed frame is fixedly connected to the top of the four sliding posts, and a shielding plate for shielding the part of the workpiece that does not need sandblasting is fixedly connected to the top of the fixed frame.

[0010] The present invention is further configured such that the slide bar includes an adsorption block and a stop block slidably connected to the sliding groove, the adsorption block adsorbs onto the side of the first electromagnet, a middle rod is fixedly connected between the adsorption block and the stop block, and the slider is movably sleeved on the outside of the middle rod.

[0011] The present invention is further configured such that the top of the fixed plate is provided with four slots with vertically intersecting sliding grooves, a locking plate is movably inserted into the slot, and the locking plate is locked onto the outside of the middle rod, and a return spring is movably sleeved on the outside of the middle rod, and the return spring is located between the locking plate and the stop block.

[0012] The present invention is further configured such that a discharge port for discharging sand is provided at the bottom of the sliding groove, and the discharge port extends through the bottom of the chassis.

[0013] The present invention is further configured such that a cover plate is fixedly connected to the top of the chassis, and four sliding ports corresponding to the four discharge ports are opened inside the cover plate, and the clamping block is slidably connected to the inside of the corresponding sliding port.

[0014] The present invention is further configured such that a mounting hole is provided at the center of the top of the clamping block, and a fastening bolt is movably sleeved inside the mounting hole. The threaded part of the fastening bolt is threaded into the inside of the slider, and the bottom of the fastening bolt rests on the top of the corresponding middle rod.

[0015] The present invention is further configured such that a rubber pad is fixedly connected to the inner side of the clamping block, and a rubber plug is inserted into the inside of the mounting hole.

[0016] The present invention is further configured such that a through threaded hole is provided on the side wall of the mounting port, and a fixing bolt is threaded inside the threaded hole, and the fixing bolt abuts against the outside of the sleeve.

[0017] This utility model has the following beneficial effects:

[0018] 1. This utility model uses the first electromagnet at the bottom of the fixed plate to attract the suction block of the slide rod, which can drive the clamping block to move along the sliding groove towards the center to tightly clamp the workpiece. At the same time, the return spring can automatically push the slide rod to release the clamping block from the workpiece when the first electromagnet is de-energized. There is no need to manually move the clamping block, which realizes the rapid and stable fixation of workpieces of different specifications and reduces the processing deviation caused by workpiece displacement during sandblasting.

[0019] 2. This utility model achieves fixation by adjusting the vertical position of the inner sleeve of the mounting port of the base frame and abutting the outside of the sleeve with fixing bolts. Then, the second electromagnet at the bottom of the sleeve attracts the sliding column, causing the fixing frame and the baffle to sink synchronously, so that the baffle accurately fits the part of the workpiece that does not need to be sandblasted. This can accurately block the non-machined surface of the workpiece and avoid damage caused by accidental sandblasting. At the same time, the height and position of the baffle can be flexibly adjusted according to the size of the workpiece and the position of the non-machined surface to adapt to the sandblasting protection needs of different workpieces. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the shielding component of this utility model.

[0023] Figure 3 This is a schematic diagram of the structure of the fixing plate of this utility model.

[0024] Figure 4 This is a schematic diagram of the chassis structure of this utility model.

[0025] Figure 5 for Figure 3 A magnified structural diagram of point A in the middle.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 100. Fixed plate; 101. Chassis; 101a. Central groove; 101b. Sliding groove; 101c. Discharge port; 101d. Slot; 101e. Mounting port; 101f. Threaded hole; 102. First electromagnet; 103. Slide rod; 103a. Adsorption block; 103b. Stop block; 103c. Central rod; 104. Slider; 105. Clamping plate; 106. Return spring; 107. Cover plate; 107a. Sliding port; 108. Clamping block; 108a. Rubber pad; 108b. Mounting hole; 108c. Fastening bolt; 108d. Rubber plug; 200. Shielding assembly; 201. Sleeve; 202. Fixing bolt; 203. Second electromagnet; 204. Sliding column; 205. Fixed frame; 206. Shielding plate; 300. Base frame. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Example 1

[0030] Please see Figures 1 to 4 This utility model relates to a sandblasting protective fixture, comprising a base frame 300; a fixing plate 100 for fixing the workpiece to be processed is fixedly connected to the top of the base frame 300; a shielding component 200 for shielding the parts of the workpiece that do not need sandblasting is provided on the top of the fixing plate 100; the base frame 300 provides stable support for the entire fixture; the fixing plate 100 can firmly fix the workpiece to be processed, ensuring the stability of the workpiece position during sandblasting and reducing processing deviations; the shielding component 200 can accurately shield the parts of the workpiece that do not need sandblasting, preventing sand from being accidentally sprayed and damaging the non-processed surfaces of the workpiece.

[0031] The fixed plate 100 includes a base plate 101 fixedly connected to the top of the base frame 300. A central groove 101a and four sliding grooves 101b communicating with the central groove 101a are provided at the center of the top of the base plate 101. A through mounting port 101e is provided at each of the four corners of the base plate 101. A first electromagnet 102 is installed inside the central groove 101a. A slide rod 103 is slidably connected inside the sliding groove 101b. A slider 104 is installed outside the slide rod 103. A clamping block 108 for clamping the workpiece to be processed is installed on the top of the slider 104. By attracting one end of the slide rod 103 by the first electromagnet 102, the clamping block 108 can be driven to clamp the workpiece, ensuring that the workpiece does not shift during the sandblasting process and reducing processing errors.

[0032] A cover plate 107 is fixedly connected to the top of the chassis 101. The cover plate 107 has four sliding ports 107a that correspond to the four discharge ports 101c respectively, and the clamping block 108 is slidably connected to the interior of the corresponding sliding port 107a.

[0033] Specifically, the slide bar 103 includes an adsorption block 103a and a stop block 103b slidably connected to the sliding groove 101b. The adsorption block 103a is adsorbed onto the side of the first electromagnet 102. A middle rod 103c is fixedly connected between the adsorption block 103a and the stop block 103b. The slider 104 is movably sleeved on the outside of the middle rod 103c. The adsorption block 103a is stably adsorbed onto the first electromagnet 102, realizing the rapid positioning of the slide bar 103 in the sliding groove 101b without manual adjustment, thus improving operating efficiency.

[0034] The top of the fixed plate 100 has four slots 101d with vertically intersecting sliding grooves 101b. A retaining plate 105 is movably inserted into the slot 101d. The retaining plate 105 is engaged with the outside of the middle rod 103c. A return spring 106 is movably sleeved on the outside of the middle rod 103c. The return spring 106 is located between the retaining plate 105 and the stop block 103b. When the first electromagnet 102 is de-energized and loses its attraction force, the return spring 106 can drive the slide rod 103 away from the first electromagnet 102 along the sliding groove 101b, thereby causing the clamping block 108 to automatically release the workpiece without the need to manually move the clamping block 108, thus improving the ease of operation and processing efficiency.

[0035] The clamping block 108 has a mounting hole 108b at the top center. A fastening bolt 108c is movably fitted inside the mounting hole 108b. The threaded part of the fastening bolt 108c is threaded into the inside of the slider 104, and the bottom of the fastening bolt 108c rests on the top of the corresponding middle rod 103c. The fastening bolt 108c connects to the slider 104 through the thread and presses against the middle rod 103c, which can fix the slider 104 and the middle rod 103c relatively, preventing the clamping block 108 from shifting during sandblasting vibration and ensuring clamping stability. Loosening the bolt can adjust the position of the slider 104, which is flexible and easy to quickly adapt to workpieces of different sizes and shapes.

[0036] Furthermore, the bottom of the sliding groove 101b is provided with a discharge port 101c for discharging sand, and the discharge port 101c penetrates the bottom of the chassis 101. The discharge port 101c can discharge the sand that falls into the sliding groove 101b during the sandblasting process from the chassis 101 in a timely manner, so as to avoid the sand from accumulating and clogging the sliding groove 101b.

[0037] A rubber pad 108a is fixedly connected to the inner side of the clamping block 108, and a rubber plug 108d is inserted inside the mounting hole 108b. The rubber pad 108a is elastic and can prevent the clamping block 108 from making hard contact with the workpiece, prevent the workpiece surface from being pinched or scratched, and protect the appearance quality of the workpiece. At the same time, the rubber pad 108a can increase the friction with the workpiece, improve the clamping stability, and prevent the workpiece from slipping during sandblasting. The rubber plug 108d can seal the mounting hole 108b to prevent sand, dust and other impurities from entering the hole.

[0038] The operation process of this embodiment is as follows: When it is necessary to fix the workpiece, firstly, according to the outer circumference size of the workpiece to be processed, loosen the fastening bolt 108c in the mounting hole 108b at the top of the clamping block 108, release the top tightening limit of the centering rod 103c, slide the slider 104 along the centering rod 103c, adjust the spacing of the clamping blocks 108 to match the workpiece, then tighten the fastening bolt 108c to lock the position of the slider 104, then place the workpiece stably at the top center of the cover plate 107, and seal the mounting hole 108b with the rubber plug 108d, then start the first electromagnet 102 to attract the workpiece. The suction block 103a of the slide bar 103 drives the slide bar 103 to move towards the center along the sliding groove 101b, so that the clamping block 108 tightly clamps the workpiece through the rubber pad 108a. This can achieve fast and stable fixation of the workpiece to be processed, ensure the stability of the workpiece position during sandblasting, and reduce processing deviation. After sandblasting is completed, the first electromagnet 102 is turned off, the return spring 106 pushes the stop block 103b to make the slide bar 103 move in the opposite direction, and the clamping block 108 automatically releases the workpiece. The workpiece can be directly removed. Automatic clamping and releasing can avoid manual adjustment of the workpiece position and improve processing efficiency.

[0039] Example 2

[0040] Please see Figures 1 to 3 Based on the first specific embodiment, the shielding assembly 200 includes four sleeves 201 that are movably fitted inside the corresponding sliding grooves 101b. The bottom of each of the four sleeves 201 is fixedly connected to a second electromagnet 203. The inside of each of the four sleeves 201 is movably fitted with a sliding post 204, and the sliding post 204 is attracted to the top of the corresponding second electromagnet 203. The top of the four sliding posts 204 is fixedly connected to a fixing frame 205. The top of the fixing frame 205 is fixedly connected to a shielding plate 206 for shielding the part of the workpiece that does not need sandblasting. When the second electromagnet 203 attracts the sliding post 204, it can provide a stable downward attraction force, thereby driving the fixing frame 205 and the shielding plate 206 to move down synchronously, ensuring that the shielding plate 206 is in contact with the part of the workpiece that does not need sandblasting.

[0041] Specifically, the side wall of the mounting port 101e has a through threaded hole 101f. The threaded hole 101f is threaded with a fixing bolt 202, and the fixing bolt 202 abuts against the outside of the sleeve 201. The threaded hole 101f provides a precise threaded installation position for the fixing bolt 202, ensuring that the bolt assembly is stable. By abutting against the outside of the sleeve 201, the fixing bolt 202 can firmly fix the sleeve 201 in the mounting port 101e, preventing the sleeve 201 from shifting due to vibration during sandblasting. Loosening the bolt can adjust the position of the sleeve 201, which is convenient for adjusting the position according to the workpiece requirements.

[0042] The operation process of this embodiment is as follows: When it is necessary to shield the workpiece, first loosen the fixing bolts 202 in the threaded holes 101f on the side wall of the four corner mounting ports 101e of the chassis 101. After releasing the abutment limit of the sleeve 201, adjust the position of the sleeve 201 up and down along the mounting port 101e. Then tighten the fixing bolts 202 to fix the sleeve 201. Then activate the second electromagnet 203 at the bottom of the sleeve 201. The sliding column 204 inside the sleeve 201 is attracted and slides down along the inner wall of the sleeve 201, driving the fixing frame 205 and the shielding plate 206 to sink synchronously until the bottom of the shielding plate 206 is in contact with the surface of the workpiece that does not need to be sandblasted. Keep the second electromagnet 203 energized to maintain tight contact. Sandblasting can then be carried out to avoid accidental damage to non-machined surfaces. After sandblasting is completed, turn off the second electromagnet 203. The sliding column 204 loses its attraction force. Pull the fixing frame 205 upward to make the shielding plate 206 detach from the workpiece, and the workpiece can be easily removed.

[0043] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A sandblasting protective fixture, comprising a base frame (300); characterized in that: The top of the base frame (300) is fixedly connected to a fixing plate (100) for fixing the workpiece to be processed, and the top of the fixing plate (100) is provided with a shielding component (200) for shielding the part of the workpiece to be processed that does not need to be sandblasted. The fixed plate (100) includes a base plate (101) fixedly connected to the top of the base frame (300). The base plate (101) has a central groove (101a) and four sliding grooves (101b) connected to the central groove (101a) at the center of the top. The base plate (101) has a through mounting port (101e) at each of the four corners. A first electromagnet (102) is installed inside the central groove (101a). A slide rod (103) is slidably connected inside the sliding groove (101b). A slider (104) is installed outside the slide rod (103). A clamping block (108) for clamping the workpiece to be processed is installed on the top of the slider (104). The shielding assembly (200) includes four sleeves (201) that are movably fitted inside the corresponding sliding grooves (101b). The bottom of each of the four sleeves (201) is fixedly connected to a second electromagnet (203). The inside of each of the four sleeves (201) is movably fitted with a sliding post (204), and the sliding post (204) is attracted to the top of the corresponding second electromagnet (203). The top of each of the four sliding posts (204) is fixedly connected to a fixing frame (205), and the top of the fixing frame (205) is fixedly connected to a shielding plate (206) for shielding the part of the workpiece that does not need sandblasting treatment.

2. The sandblasting protective fixture according to claim 1, characterized in that, The slide bar (103) includes an adsorption block (103a) and a stop block (103b) slidably connected to the sliding groove (101b), and the adsorption block (103a) is adsorbed on the side of the first electromagnet (102). A middle rod (103c) is fixedly connected between the adsorption block (103a) and the stop block (103b), and the slider (104) is movably sleeved on the outside of the middle rod (103c).

3. A sandblasting protective fixture according to claim 2, characterized in that, The top of the fixed plate (100) is provided with four slots (101d) with vertically intersecting sliding grooves (101b). A retaining plate (105) is movably inserted into the slot (101d) and is engaged with the outside of the middle rod (103c). A return spring (106) is movably sleeved on the outside of the middle rod (103c) and is located between the retaining plate (105) and the stop block (103b).

4. A sandblasting protective fixture according to claim 1, characterized in that, The bottom of the sliding groove (101b) is provided with a discharge port (101c) for discharging sand, and the discharge port (101c) penetrates the bottom of the chassis (101).

5. A sandblasting protective fixture according to claim 4, characterized in that, The top of the chassis (101) is fixedly connected to a cover plate (107). The cover plate (107) has four sliding ports (107a) that correspond to the four discharge ports (101c) respectively, and the clamping block (108) is slidably connected to the interior of the corresponding sliding port (107a).

6. A sandblasting protective fixture according to claim 1, characterized in that, The clamping block (108) has a mounting hole (108b) at the top center. A fastening bolt (108c) is movably sleeved inside the mounting hole (108b). The threaded part of the fastening bolt (108c) is threaded into the inside of the slider (104), and the bottom of the fastening bolt (108c) rests on the top of the corresponding middle rod (103c).

7. A sandblasting protective fixture according to claim 6, characterized in that, A rubber pad (108a) is fixedly connected to the inner side of the clamping block (108), and a rubber plug (108d) is inserted into the inside of the mounting hole (108b).

8. A sandblasting protective fixture according to claim 1, characterized in that, The mounting port (101e) has a through threaded hole (101f) on its side wall. A fixing bolt (202) is threaded inside the threaded hole (101f) and the fixing bolt (202) abuts against the outside of the sleeve (201).

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